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The Law of Disassembly

An anonymous reader writes "Smalltimes has a story by Douglas Mulhall, author of Our Molecular Future, which discusses molecular nanotechnology (MNT) disassembly, and argues for what he calls the 'Law of Disassembly,' that 'every MNT product must be disassemblable by at least one [of several possible methods].' The article ends with some good suggestions for raising awareness of this important issue. Gratuitous quote: This is disturbingly reminiscent of "nuclear power will give us clean limitless energy, and don't worry, we'll deal with the byproducts later because we'll have the tools by then.""

195 comments

  1. The other day I saw... by Beolach · · Score: 3, Interesting

    A show (I think it was on the History Channel) about nano-technology. It had a pretty funny interview with the guy who created a single molecule motor. He admitted it was a pointless endeaver because there's really no way to use a single molecule motor, but he did it "mostly because it's cool." That's how I define a geek.

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    1. Re:The other day I saw... by Bios_Hakr · · Score: 1, Insightful

      He may be an ubergeek, but he's still a shortsighted tool.

      Writing your own bootloader is a pointless endeavour.

      Writing your own OS is pointless.

      Rebuilding a 1970s MOPAR classic is pointless.

      In the first days of crude oil refinement, gasoline was considered a waste product. People eventually found a use for it.

      There are literally thousands of exapmles in history of a product being completely useless (or producing a useless by-product) that later turned out to be more valuable than what the inventor originally intended.

      Even at the very least, the technological advancement needed to observe a single molecule motor is impressive. Add to that the tech needed to manipulate something that small and what you have is nothing less than amazing.

      --
      I'd rather you do it wrong, than for me to have to do it at all.
    2. Re:The other day I saw... by ron_ivi · · Score: 1
      The disassembly law reminds me of an interesting technothriller book called Acts of the Apostles in which a major character is begged to build such a weakness in his nano-machine for fear it may be used as a weapon.

      It was quite the fun book for those paranoid about technology, especially nano/bio stuff.

  2. Clarify by Chess_the_cat · · Score: 3, Insightful
    This is disturbingly reminiscent of "nuclear power will give us clean limitless energy, and don't worry, we'll deal with the byproducts later because we'll have the tools by then."

    And weren't they right? Nuclear power does give us clean, limitless engery and we can deal with the byproducts no problem.

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    Support the First Amendment. Read at -1
    1. Re:Clarify by furballphat · · Score: 4, Insightful

      If by 'deal with' you mean dump in a hole in the ground and hope no one goes near it for a few millenia, then yes.

    2. Re:Clarify by LostCluster · · Score: 2, Interesting

      If by 'deal with' you mean dump in a hole in the ground and hope no one goes near it for a few millenia, then yes.

      And we have said hole in the ground selected, and already have the security tech and plans to make sure nobody goes near it for a few millenia.

      What's interesting about the protests about the project is that the political types that represent the area where the hole is are fine with the project... it brings plenty of jobs to their area, and they're convinced of the safety. Therefore, the FUD-spreaders are trying to construct "What if..." situations arround the movement of the nuclear mater to the hole, but we've got secure ways to move nuclear stuff. So really, what's the problem with the plan?

    3. Re:Clarify by steveha · · Score: 5, Insightful

      Which is more dangerous: a few kilograms of nuclear waste, packed up in (for example) ceramic blocks; or thousands of kilograms of coal smoke, dispersed into the air we breathe? And by the way, how many people get hurt or killed mining coal (and let's be sure to count "black lung")? (People get hurt and killed mining uranium, too, but you don't need anywhere near as much for a power plant, compared with coal.)

      Which is more dangerous: a few kilograms of nuclear waste, or a few kilograms of concentrated weird chemical byproducts from heavy industry?

      It would be a good idea to really look at the whole cost/benefit analysis for nuclear power vs. other things we have that don't contain the word "nuclear".

      steveha

      --
      lf(1): it's like ls(1) but sorts filenames by extension, tersely
    4. Re:Clarify by mbasyro13 · · Score: 4, Interesting

      I once read an article that claimed that if you calculate the amount of trace uranium in the coal we burn each year, it adds up to far more than all our nuclear waste combined...and of course it ends up in the air we breathe. Not sure if it's really true, but an interesting thought.

      I guess it comes down to which is better: A 100% chance your health is being harmed slowly, or small chance your health could be harmed drastically.

      Dave

    5. Re:Clarify by Anonymous Coward · · Score: 1, Interesting

      hmmmmm.... I thought most lung-related diseases of miners were solved with technology? How recent are these data?

    6. Re:Clarify by sketerpot · · Score: 2, Insightful

      I'll take the small chance. Especially since what we do with nuclear waste is a bit more complex than just sticking it in a hole in the ground. We do geological studies to ensure that the hole won't change much, we build fancy containment facilities, and have the whole thing carefully managed and guarded. I much prefer that to just releasing all that pollution into the air, water, and whatever else you can think of.

    7. Re:Clarify by Anonymous Coward · · Score: 0, Informative

      "Which is more dangerous: a few kilograms of nuclear waste, packed up in (for example) ceramic blocks; or thousands of kilograms of coal smoke"

      Thats a very stupid remark, lost your brain or what..?

      I could easily create a dirty bomb with your few kilograms and nuke New York (hmm...)

      I'll try to explain:
      divide nuclear in- nuclear fusion and fission

      nuclear fission will yield more energy than coal burning and creates a lot of waste, but less than coal,
      Yes its more efficient but the waste will still be there when your grandchildren walk this earth

      (don't let yourself be fooled its "only" a few kilograms, its a lie).

      fusion on the other hand is more interesting(H-bomb)

      Take a look at the sun, and you'll see a huge clean efficient way of getting about 90-99% of the chemical energy stored in molecules(actually plasma- the electrons/proton/neutrons have so much energy they wont attach to each other (for long))

      But the problem is the sheer size of a plant which could contain the energies released

      No worries we will be able to one day.

      As you can deduce yourself, I am very much in favor of nuclear fusion, NOT fission

      And all around people make more fission plants, very stupid indeed

      http://library.thinkquest.org/17940/texts/fissio n/ fission.html
      http://www-pub.iaea.org/MTCD/NF/NFus ion.asp

    8. Re:Clarify by name773 · · Score: 0

      also, there are bits of uranium in the coal used in coal plants. The amount of radation near a coal plant is greater than the amount of radiation near a nuclear power plant

    9. Re:Clarify by Anonymous Coward · · Score: 1, Insightful
      Nuclear power does give us clean, limitless engery and we can deal with the byproducts no problem.

      It's the security problems, stupid.

      If we have nuclear power plants, then every nation demands nuclear power plants. Why do some of them they want these? It's not to save money on coal. It's because they know that if they can siphon off enough plutonium from their nuclear program to build a few bombs, then they'll have the deterrent to ensure that they never have to suffer Saddam's fate. Of course, what happens to these assets during the next coup attempt?

      Closer to home, you have the problem of terrorists crashing a 747 into a spent fuel pond at a reactor site, or a team of unlawful combatants infiltrating our borders and attacking the rent-a-cops defending any one of the 100 or so reactor sites in this country. They really messed things up here when they ruined the real-estate values of a few square blocks of NYC for 5 years; imagine how happy they'd be to do the same to a few whole counties for 50 years. But hey, if we just suspend the bill of rights, the DoHS can protect us from these possibilities.

      And we put up with all of this so that we can generate 20% of our electricity.

    10. Re:Clarify by Musc · · Score: 1

      >And all around people make more fission plants, >very stupid indeed

      I thought that we use fission rather than fusion not due to stupidity, but because the technology for fusion power plants doesn't exist yet. Have I been misinformed?

      --
      Hamsters are at least as feathery as penguins. HamLix
    11. Re:Clarify by Short+Circuit · · Score: 2, Informative

      No, you haven't. Currently, we don't have any manageable systems available that produce more energy than required to keep the reaction going. (In fact, we don't have any manageable systems that can sustain themselves.)

      I suppose the parent has a point in that a fusion bomb does produce enough energy to further itself, at least for a little while, and we simply don't have the technology to contain all the energy required to sustain a reaction of that type.

    12. Re:Clarify by chgros · · Score: 2, Informative

      Take a look at the sun, and you'll see a huge clean efficient way of getting about 90-99% of the chemical energy stored in molecules
      Chemical energy is what you get when e.g. you burn something: this is the energy from interatomic bonds (electromagnetic force).
      Atomic energy is different, it comes from the bonds between protons / neutrons inside of the nucleus (I'd say it's the strong force but I'm not sure).
      I think the mass loss for fission is 1/1000, 4/1000 for fusion (for chemical probably in the order of 10-e9) (of course E=mc^2)
      I don't really know what your percentage means. The element with lowest nuclear energy is iron, so to get the most of nuclear energy ("100%") you'd have to turn everything to iron.

    13. Re:Clarify by Nefarious+Wheel · · Score: 1

      Read "Karma" by Arsen Darney for an excellent treatment of this subject.

      --
      Do not mock my vision of impractical footwear
    14. Re:Clarify by Artraze · · Score: 1

      Actually, we can 'deal with' it. They're called breeder reactors. They make spent uranium usable, but produce plutonium.

      God forbid we'd have a little plutonium hanging around. Therefore people shut down the breeders and just burried the spent uranium. A couple years later people complained about burrying it.

      Since it wouldn't be economical to propel it into space, the only solution is to shut down the power plants. ...and burn stuff... great idea. A couple years later people will be complaining about global warming from the smoke. Er ... they seemed to have jumped the gun on that...

    15. Re:Clarify by dvdeug · · Score: 4, Insightful

      I could easily create a dirty bomb with your few kilograms and nuke New York

      You can't nuke New York. There's a big difference between dropping a nuclear weapon on New York and spreading radioactive dust around New York.

      In any case, you can easily steal this material? And then pulvarize it (without killing yourself) and attach it to a bomb that can distribute it throughout a city? This seems way more complex then the most complex attack that terrorists have ever carried out.

      the waste will still be there when your grandchildren walk this earth

      So? A lot of waste will still be here when my grandchildren walk this earth.

      Take a look at the sun, and you'll see a huge clean efficient way of getting about 90-99% of the chemical energy stored in molecules

      In other words, you know nothing the subject. Burning releases chemical energy. Nuclear reactions release energy bound in the nucleus of the atom, not chemical energy stored in molecules.

      I am very much in favor of nuclear fusion, NOT fission

      And I'm in favor of opening a wormhole to another universe and directly sucking the energy through. But that, like nuclear fusion, isn't possible today. So we have to use real-world power generation. So far, fission is one of the few pratical means of generating the power we need anywhere on Earth.

    16. Re:Clarify by aardvarkjoe · · Score: 1

      Please don't feed the trolls. It's bad enough that they get moderated up.

      --

      How can we continue to believe in a just universe and freedom to eat crackers if we have no ale?
    17. Re:Clarify by Bios_Hakr · · Score: 1

      What I don't understand is this:

      If the rods are still radioactive, then why are they considered waste?

      The material in these rods has been in the ground for longer than man has been on the planet. Why are they considered waste after a year of being in a reactor?

      At the very least, we could have smaller reactors designed to deal with the lower energy output.

      If people weren't such tools about plutonium, we could use breeder reactors. Build one amd run it till it produced enough waste to power a second. Then use those to produce enough for 2 more. Of course, what do you do when you have enough reactors and now they are all breeding more plutonium?

      --
      I'd rather you do it wrong, than for me to have to do it at all.
    18. Re:Clarify by Anonymous Coward · · Score: 0

      And we have said hole in the ground selected, and already have the security tech and plans to make sure nobody goes near it for a few millenia.
      Does have some more specific info on this? I mean it is pretty tricky to plan for a "few millenia". Has it been done before? Maybe the pyramids of Egypt would be an example.
      How long will it be before somebody questions the lore of the ancient energy waste caves and digs one up?

    19. Re:Clarify by Anonymous Coward · · Score: 0
      We do geological studies to ensure that the hole won't change much

      Then they ignore the warnings from the geologist.

    20. Re:Clarify by AlaskanUnderachiever · · Score: 1
      Yes, the amazing "technology" fix! Now available to the top 5% of the world that can afford it!

      I invite you to visit the other 95%. I have. There's about as many people wearing safety equipment overseas as there are Democrats supporting George Bush.

      --
      Find out about my new childrens book: SS Death Camp Criminal Batallion Go To Monte Carlo For The Massacre
    21. Re:Clarify by Hrrrg · · Score: 1
      If by 'deal with' you mean dump in a hole in the ground and hope no one goes near it for a few millenia, then yes.
      And we have said hole in the ground selected, and already have the security tech and plans to make sure nobody goes near it for a few millenia.
      Do we? I used to think so. But how do we get the nuclear fuel safely to Yukka Mountain? Obviously we have have to transport it by train or truck. But how do you create a transport device that cannot be punctured by a terrorist with an anti-tank missile? Suddenly you will have tens of thousands of high-value terrorist targets moving through America's cities and towns. Chicago is supposed to be one of the hubs for transporting this nuclear waste (according to 60 Minutes). Is it practical to transport this waste while avoiding all large and small urban areas? I doubt it. Keeping the nuclear waste in place creates countless stationary targets for terrorists. And what happens if a terrorist organisation one day obtains a nuclear missile and threatens to target Yukka Mountain?
    22. Re:Clarify by LostCluster · · Score: 1

      You can't quite create a transport device that can't be punctured period, but you can secure the route that cargo will take on the night that it will be transported so that nobody can get close enough to threaten the caravan. The Secret Service knows all of the things that can be done to protect a route, they do high-profile ground transports for VIPs all of the time, not just the president but every high-level governmental leader. (Even the Democratic challenger to President Bush will get Secret Service protection once he is officially is selected.) Sure, this will be a higher-stakes project, but that just means no expense will be spared in making sure that terrorists don't know which vehicle in the caravan has the payload, nobody will know what time exactly the caravan will pass, and every point where there is a chance to interfere with the path has already been secured and monitored until it does pass.

    23. Re:Clarify by vidnet · · Score: 2, Interesting
      So let's find out:

      Googling a bit gives us the statistics of West Virginia Coal association (around 164 million tons in 2003), and trace info on west virginian trace amounts of uranium in coal (1.59ppm mean value). This might be a small fraction, but it's probably accurate.

      So we have 1.59 mol uranium per million mol coal. I'll also assume that a ton is a metric ton and that coal exists entirely of carbon.

      164M tons at 12.0107 g/mol gives us 13654491411824 mol. At 1.59ppm, we have 21710641 mol of uranium. At 238.0289 g/mol, we get 5167132640g = 5167133kg = 5167 tons.

      Looks about right. Now let's do a rougher world estimates. This site says coal accounts for 93 Quadrillion BTUs. The number of BTUs per ton of coal varies, but according to Wikipedia's Coal entry, it's around 20M BTU/ton, so 4650M tons of coal. We'll still assume 1.59ppm U. Doing the same as above gives us 146515653621g=146515 ton. Since we used estimates and estimates of estimates, we'll just say "over 100,000 tons".

      The usage of uranium? 42,500 tonnes. I suppose that's different fron tons, but screw that, I'm tired.

      So yes, if my calculations hold, it's true. There is a lot more uranium in the coal than what we mine.

    24. Re:Clarify by steveha · · Score: 1

      I could easily create a dirty bomb with your few kilograms and nuke New York (hmm...)

      You could also take a bunch of asbestos (from an old building, say), and make a dirty asbestos bomb. Both will really suck for the people who breathe near where they went off. How much worse would the nuclear waste be compared to the asbestos? How do you know -- have you really compared them?

      Neither one can kill the whole city. A "dirty nuclear bomb" does have the word "nuclear" in it, so it will be scarier, though.

      the waste will still be there when your grandchildren walk this earth

      The nuclear waste that will last for millions of years is not very radioactive. The more radioactive it is, the shorter the half-life, and if it will last millions of years the half-life can't be all that short.

      steveha

      --
      lf(1): it's like ls(1) but sorts filenames by extension, tersely
    25. Re:Clarify by Anonymous Coward · · Score: 0

      "And I'm in favor of opening a wormhole to another universe and directly sucking the energy through. "

      Not bad, but better still would be accessing a hyperdimensional energy source. Granted, the amount of energy required to initially access hyperspace would be huge, but trivial once access to hyperdimensional energy is available to maintain access.

    26. Re:Clarify by replicant108 · · Score: 1

      Nothing like a straw-man argument when you're losing the debate!

      Personally, I've never heard an environmentalist advocate growth in the fossil-fuel industry. Normally, the suggested solution is two-fold:

      1. Reduce energy usage (by conserving energy, reducing the need for long-distance travel, etc)

      2. Develop sustainable, less-damaging form of energy production (solar, wind, tidal power, etc)

      Seems sensible to me. But go ahead, feel free to stereotype your opponents as scientifically-illiterate luddites. It's not like you're going to get called on it here, is it?

    27. Re:Clarify by Alphtoo · · Score: 1

      Okay you guys, all this stuff is really, really bad for us. I think I'll just put on a jacket and cap. And I'll cook my pig over hickory and my cow over mesquite... but wait! That's also bad. Screw it, I'm gonna do it anyway.

    28. Re:Clarify by Alphtoo · · Score: 1

      Right. Just ship your byproducts down here to South Carolina, we'll take care of 'em. The energy is clean, limitless, and we get to glow in the dark. Thanks, guys!

  3. Open Source? by dekashizl · · Score: 4, Informative

    From the article summary, I thought he meant "disassemble" as in reverse engineer and figure out how the things work, and I was thinking "cool, like open source nanotech."

    But in reading the article, I found this is not what he's talking about. Instead he is talking about how to decommission various molecular nanotechnology (MNT) creations, and e.g. the difficulties that are created by shields and shells created around various small scale entities.

    I think both of these sides to "disassembly" seem pretty damn important.

    1. Re:Open Source? by Anonymous Coward · · Score: 0

      You aren't supposed to read the article - that's cheating!

  4. Nuclear plants are just fine... by NotQuiteReal · · Score: 4, Interesting
    Why don't they bury the waste on a downward going subduction plate?

    All those isotopes came from somewhere down there anyhow, right?

    Nuclear power seems pretty damn clean to me, and I live about 15 miles from a nuc plant that produces my power, far cheaper (per Kwh) than anything else with no polution that I can see.

    --
    This issue is a bit more complicated than you think.
    1. Re:Nuclear plants are just fine... by iggymanz · · Score: 1

      Yup, we have the means to deal with the products right now, just bury in the right place & manner. Even the plates that aren't downward going in the near term with have their stuff go downward eventually - that's why one can't find rocks on the earth that date as old the earth! Heck, anything we call "the environment" is going to be destroyed anyway.

    2. Re:Nuclear plants are just fine... by jarran · · Score: 5, Interesting

      Why don't they bury the waste on a downward going subduction plate?

      Because to get it in an effective locations, you'd have to bury it insanely deep, and it would still only get drawn down below the plate at an incredibly slow rate. The plates move at most an inch or so a year.

      I live about 15 miles from a nuc plant that produces my power, far cheaper (per Kwh) than anything else

      Your doing better than we are here in the UK then. The entire nuclear industry would be bankrupt if it weren't for the government pouring millions and millions of pounds of taxpayers money into privately owned companies. And even then, it's still virtually bankrupt, and producing power that's more expensive per Kwh than virtually any other method. If we had a true free market in the UK power industry, we'd have no nuclear power.

      with no polution that I can see

      Yeah, you can't see it, but that's because it's really dangerous, and it's therefore stowed away under armed guard somewhere. Still, it will give your children a good steady job keeping it safe. And your childrens children. And your childrens childrens children. And your childrens childrens childrens children. And so on and so forth for the next ten thousand or so generations.

    3. Re:Nuclear plants are just fine... by bluGill · · Score: 2, Insightful

      People keep forgetting that all this so called waste is recycleable, for more power than the orignal action to produce it.

      I know nothing about the state of UK's power, but I find it hard to belive that you couldn't make a profit in the free market with nuclear power. What other choices do you have for your power? Wind and tide sound like good ideas, but just don't produce that much. Import coal/gas/oil? Not enough sun to make solar worth trying on a large scale. Not enough land to grow a renewable source (see solar above). Or do I just not understand the UK, something I'll admit to.

    4. Re:Nuclear plants are just fine... by Anonymous Coward · · Score: 0

      well I've heard an economist say economists could run a country better therefore I theorize that you are an engineer.

    5. Re:Nuclear plants are just fine... by quax · · Score: 2, Informative

      Not those particular isotopes. Nuclear reactions tend to create new less stable and hence more radioactive isotopes. The once that decay quickly are initially most dangerous, but it is the once with half-times in excess of a couple of thousand years that cause long term headache.

      You're idea is nevertheless charming, but in order to get them into a region that really gets subducted completly you would have to dig a very deep hole. It'll be very expansive if at all doable. If you don't get deep enough you will just end up deposing nuclear waste in an earthquake prone area, and virtually gurantee that the ecosystem there will be contaminated sooner or later.

    6. Re:Nuclear plants are just fine... by Anonymous Coward · · Score: 0

      Their byproduct that isn't in the papers unless it concerns Korea is an "enviro friendly" weapons grade plutonium.

      Spent rods=Nukes

      We'll run out of calcium chloride cavities to pump the shit in and how many Depleted Uranium bullets can you possibly use?

    7. Re:Nuclear plants are just fine... by PsionicMan · · Score: 1

      (I'm a USian but I'm going to have a guess anyway)

      The problem with trying to make a profit on nuclear power is, I'd imagine, mostly a problem of PR. Nuclear energy has such a horrible reputation with the average person (with people I know, at least) that it'd be an uphill battle to get anyone to buy power from you.

      I'm playing armchair sociologist here, but I'd wager it might be due in part to the current generation of power buyers having grown up under the spectre of the cold war. I mean, sure, it's probably been the target of constant assault from various groups (environmental etc), but I really doubt that stuff could take hold as deeply as it has without something else lurking behind it, some sort of very low-level distrust of anything "nuclear". The sort of distrust one might acquire by living for many years with the very real possibility that everything was going to get blown the fuck up, say.

      --

    8. Re:Nuclear plants are just fine... by Baby+Duck · · Score: 1

      But why do we still consider it waste when the end product is 10,000 more times energetic than the start? Why can we not harness the radiation and convert it to a more palpable form? Isn't that how all human-use electricity works? If we can convert solar radiation, tides, and winds, why can't we convert gamma rays? Is anyone even trying to figure out a way?

      --

      "Love heals scars love left." -- Henry Rollins

    9. Re:Nuclear plants are just fine... by Artifakt · · Score: 1

      Let's see. The UK is generally a bit farther north than France, and has more rainy days. That means passive solar and active solar technologies have more problems. Growing Rapeseed for fuel-oil or Gasahol grade corn both have lower yields than France too, and per hectare prices for farm land are higher in the UK. The UK has depleted its coal reserves faster and more thoroughly than France as well, largely because they started this industrial revolution stuff earlier.
      Despite having less incentive than the UK, France has made nuclear power work pretty well financially, and the UK seemingly just plain can't. Congratulations original poster, you have just proved this is a political problem and not a technological one.

      --
      Who is John Cabal?
    10. Re:Nuclear plants are just fine... by Libraryman · · Score: 1
      NotQuiteReal wrote: Nuclear power seems pretty damn clean to me, and I live about 15 miles from a nuc plant that produces my power, far cheaper (per Kwh) than anything else with no polution that I can see.

      I'm not trying to start a debate about the damage damns can cause, but NOTHING makes energy cheaper with less pollution than hydropower. Hydro-damn generates electricity is essentially pollution free, and cheaper /Kwh than any other source.

      IANAC (I am not a canadian) but The Canadian Nuclear FAQ says "The only large-scale electricity-generating technology in Canada with cleaner air emissions than nuclear plants is hydroelectric power"

    11. Re:Nuclear plants are just fine... by Anonymous Coward · · Score: 0
      They've found rocks nearly as old as the earth. Earlier would be almost impossible because the went earth formed it was very hot and so there aren't a lot of rocks the survived.

      Not all rocks are subducted either. Many are eroded. Erode your storage facility and you'll destroy an entire river and more.

    12. Re:Nuclear plants are just fine... by Anonymous Coward · · Score: 0

      I'm pro-hydro, but you're leaving a lot out. Dams aren't as perfect as you claim. Covering a large region with water usually kills all the trees, etc in the area. Also, dams don't last forever. They eventually fill with silt. Then what do you do?

    13. Re:Nuclear plants are just fine... by 0123456 · · Score: 1

      And nuclear power would be a whole lot cheaper without a government to impose silly regulations on them and prevent new plants being built: I believe that most nuclear plants in the UK are old ones that have pretty much reached their planned lifetime, and many were built primarily to produce plutonium for British bombs, with power just a useful sideline.

      "Yeah, you can't see it, but that's because it's really dangerous,"

      Yeah, that nuclear waste might just come creeping through my bedroom window and night and murder me, or shoot me in the head to steal my mobile phone.

      Dealing with highly radioactive nuclear waste is easy, since so little is produced each year. Stick it in a stable desert somewhere, surround it with minefields, automated machineguns and anti-aircraft missiles and otherwise basically forget about it. For all we know your grandkids may even be thankful to us for leaving them such a rich source of exotic materials to be mined to energise their dilithium crystals, or whatever.

    14. Re:Nuclear plants are just fine... by Draknor · · Score: 1

      Ok, but what about the environmental effects of damning up a river? Sure, there's no pollution at the time of generation, but what about all of the land that has been substantially changed because what was once a mighty river is now a trickle?

      Don't get me wrong - I'm all for hydro power. But "TNSTAAFL" - everything's got it price, and all of those costs need to be taken into consideration.

    15. Re:Nuclear plants are just fine... by quax · · Score: 1

      The overall energy density of slowly decaying isotops is note all that high. The biological danger stems from the fact that for each single decay the gamma/beta or alpha burst carries a lot of energy but if you tally them all up over the length of a year even a sizeable amout of nuclear waste won't get you all that far. Since the isotopes are contained all the radiation energy is converted into heat. Nuclear waste containers are designed to withstand a certain amount of heat, but with regular nuclear waste after the initial cool down period those things get toasty warm at best. Not enough useable energy there to make it worth trying to convert it into some from of electricity. But you could try to heat your house with it :)

  5. nanotechnology by 56ker · · Score: 1, Interesting

    Much as I like learning about cutting edge research - and can appreciate some of the supercomputer applications that would only be economical with nanotechnology I wondered what the other practical applications of this field were?

    Apart from making computers smaller and making tasks that previously required either parallel processing or supercomputers - eg modelling nuclear explosions, weather prediction, orbital calculations, areas of mathematical research - what are the future applications of this research that will benefit the average person?

    1. Re:nanotechnology by Genda · · Score: 1
      Hmmmmm, Interesting question...

      Let's try on a few possibilities;
      • An operational end to human death as we know it.
      • The end of hunger, disease, injury, insanity, aging, infirmity, disfigurement, and overpopulation.
      • The ability to manifest physically anything you can imagine.
      • Instant communication with anybody on the planet at the level of thought and experience.
      • Human consciousness divested from the need for corporial existence.
      • Copies of yourself (including regular backups.)
      • Information exploding in density at the speed of light.
      • Human enhancement both mental and physical that will leave us with nearly god-like capabilities.
      • Technologies we do not yet have the capacity to imagine (think manipulation of time and space.)
      • Computers with god-like powers.


      That's a short list. Truth is, once you can control matter at the levels being discussed here, you can do almost anything... as long as you are careful to clean up your messes before they get out of hand...

      Genda Bendte

      --"The gray goo ate my homework..."
  6. Build bugs to build bugs by djneko · · Score: 2, Funny

    to take other bugs apart, for raw material to build other bugs, which are also seek-and-destroy bugs to bite bad bugs back and beat them to bits. But what if the seek-and-destroy bugs have programming bugs that causes them to break out of their methods and go completely bugfuck?

    --
    `/\/\
    (^.^)
    (")(")
    not quite an analog pussy, just a cat that plays with vinyl
    1. Re:Build bugs to build bugs by Anonymous Coward · · Score: 0
      But what if the seek-and-destroy bugs have programming bugs that causes them to break out of their methods and go completely bugfuck?

      Bugger...
  7. Some nanotech shouldn't be disassembled. by Behrooz · · Score: 5, Interesting

    An interesting goal, and an innovative approach to the gray goo problem... but I take issue with his statement that *every* nanotech item should be easy to disassemble.

    Some nanotech shouldn't be disassembled, and we should know how to make it that way.

    There are some nanotech applications where this "Law Of Disassembly" would be a generally bad plan, because there are some things that we want to stay made.

    Space elevators and other similar tech come to mind... leaving easy dissassembly possibilities in megastructures is a pretty horrendous risk from a security perspective.

    Or... to toss his own ideas back at him, the possibility of long-term nuclear waste storage in virtually-indestructible nanotech containers.

    We don't want them breakable, and we don't want them to have flaws that can be exploited by unscrupulous individuals or groups.

    An analogous situation would be the single-molecule spacecraft hull postulated by Larry Niven-- completely invulnerable to nearly any conceivable force until it encountered enough antimatter to destabilize the structure and reduce the entire hull to powder. In interstellar space, unfortunately...

    I still agree that easy disassembly is a good idea for most purposes, but there are few laws that should always be applied without exception.

    --
    "We have to go forth and crush every world view that doesn't believe in tolerance and free speech." - David Brin
    1. Re:Some nanotech shouldn't be disassembled. by 24-bit+Voxel · · Score: 5, Funny
      You know the world's in the shitter when a drive by molecular disassembling becomes a valid survival concern.

      As for waste storage, I'm all for the ago old plan of sending it to Jersey COD.

    2. Re:Some nanotech shouldn't be disassembled. by soma · · Score: 1

      >Some nanotech shouldn't be disassembled, and we should know how to make it that way.

      That is only true if we depend on static structures. If nanomachines are dynamically maintaining a structure, it should be possible to have it be both extremely strong and degradable.

      Nanotechnology is probably only feasible through the use of self-reproducing (or mutually-reproducing) machines. For such machines to be at all safe, we'll have to create entire "ecosystems" of such machines such that the actions of any one machine can be countered by another. (Why not rely on pure programmatic control? Well, how would we respond to software flaws?)

      This may mean that we'll need the equivalent of tigers (predators) and dung beetles
      (scavengers) in our nanotechnological world, believe it or not. At the very least, we'll need such processes just to control "benign" devices that have been released into novel environments (think rabbits in Australia).

      Unfortunately, in this context security flaws and malicious code could take on a whole new dimension. I just hope we figure out how to secure the Internet before we develop self-reproducing nanomachines.

    3. Re:Some nanotech shouldn't be disassembled. by benjonson · · Score: 2, Interesting
      There are some nanotech applications where this "Law Of Disassembly" would be a generally bad plan, because there are some things that we want to stay made.

      I don't believe that your examples (space elevator, nuclear waste repositories) apply to the article. What he is arguing is that self-replicating devices be dissambleable (If I just coined that word, I'm sorry cause it is way ugly). If I'm wrong and such examples would require self-replicating devices to construct, them I'd have to say sorry, but I agree with the article that they should be capable of being disabled.

      --
      =-+
    4. Re:Some nanotech shouldn't be disassembled. by Behrooz · · Score: 1

      Nah, he's also talking about the difficulties of dealing with any given nano-engineered material. PCBs and dioxin aren't self-replicating, but they're incredibly nasty in the environment and incredibly expensive to ameliorate once they're there.

      Given that the entire idea of nanotechnology is designer molecules and tiny particles with interesting properties, it's a very valid concern.

      --
      "We have to go forth and crush every world view that doesn't believe in tolerance and free speech." - David Brin
    5. Re:Some nanotech shouldn't be disassembled. by Anonymous Coward · · Score: 0

      Also if you're an evil wizard creating a master ring of power to rule other lesser such rings, you want that to be difficult to destroy. Anything less than dropping it into a sun is risky. If it can be disassembled by dropping it into a volcano you will be at risk even from small hobbits.

  8. The 3 laws of Nanotechnology by servognome · · Score: 5, Funny


    1. A nanite may not injure a human being or, through inaction, allow a human being to come to harm.
    2. A nanite must obey orders given it by human beings except where such orders would conflict with the First Law.
    3. A nanite must be microwavable and explode in a flurry of sparks and smoke

    --
    D6 63 0D 70 89 81 BB 8E 7B 7C 5F 5D 54 EA AB 73
  9. Nano-pollution by steveha · · Score: 4, Interesting

    Right now we have teen-age kids writing viruses, spyware, and worms--and releasing them into the Internet. Right now I need to run a spam filter on my email, because I get about 20 real emails and 150 spams every day.

    Imagine, in the future, teen-age kids creating badly-designed nano-assemblers and turning them loose into the wild. I'm a bit worried about this.

    One of the first things we will try to do with assemblers is make medical nanites that make us all live longer. It may turn out that resistance to natural diseases isn't as important as resistance to brand-new designed diseases.

    The flawed but interesting novel The Diamond Age pictured cities in the future as pockets of safety, ringed with clouds of defensive nanites that were constantly repulsing attacks by destructive nanites. Poor kids would try to make a little bit of money by running out into the clouds with capture devices, trying to bring back interesting/useful samples of nanites, to sell to researchers. (Breath masks recommended, if you didn't want to die young with nano-scale junk in your lungs.)

    That may never happen, but we can already make artificial diamonds for use on tools. Imagine diamond-tipped chisels. Imagine tiny flakes of diamond dust in the air... tiny, sharp flakes of diamond. Could this be a problem in the near future? (Not a rhetorical question; I don't know enough about artificial diamonds, or the properties of diamond dust, to answer it.)

    steveha

    --
    lf(1): it's like ls(1) but sorts filenames by extension, tersely
    1. Re:Nano-pollution by LostCluster · · Score: 2, Insightful

      Another problem is that nanotech could possibly have the ability to create a human-infecting virus, since they'd be able to manipulate things at a molecular level... we don't want anybody going there.

    2. Re:Nano-pollution by 77Punker · · Score: 1, Interesting

      Just like the Borg on Star Trek, really. Just a few nanoprobes in the blood...bam! An hour later you're connected to the Borg network and assimilating by the thousands. Far worse than grey goo.

    3. Re:Nano-pollution by strider_starslayer · · Score: 5, Interesting

      Diamond flakes and small bits of glass are simmilar enough at scales that small that you can compare them (I guess). If you work with stained glass the next few days you cough up blood once or twice, then as I understand it, your better (I felt better the next day and no longer couged up blood, my understanding is the that blood carries the glass powder); at least, I've not encoutnered anyone who works with stained glass who has serious respatory problems (People who work with stained glass often do so without masks, perhaps unwise, but none of the people in the teaching classes use masks either, and those tiny grinders definatly make powdered glass in the air).

      Another 'big if' I keep seeing that seems somewhat unfounded is the 'won't the nanomachines kill us once we breath them in'- Laser toner is molecular scale, while that stuff isin't great for you (possible carcinogin) you don't get 'black lung' from getting a whiff of it, it dosen't poke millions of tiny holes in your cellular system, and it's actually the fact that it's easy to break down that makes it dangerous (your cells can process it, and that's where the carcinogen factor comes in).

      As for worries about bizarr 'grey goo' scenarios- EMP, and if that dosen't work; Nuke with associated EMP- then all you have are a bunch of inert bits of metal dust that'll rust soon enough, and otherwise pass harmlessly through your system.

      --
      -Millions of Monkeys, Millions of typewriters, 6 hours of sorting through faeces encrusted pages to find: This post
    4. Re:Nano-pollution by Anonymous Coward · · Score: 0

      (Not a rhetorical question; I don't know enough about artificial diamonds, or the properties of diamond dust, to answer it.)

      Diamond is the hardest known naturally occuring element. To scratch a diamond you need something of at least diamond hardness. Unless we are going to be using all these diamond tipped instruments to be cutting into our bling bling chains & rings I don't see any problem at all with "diamond dust". Was I the only person who payed attention in physics?

    5. Re:Nano-pollution by Mox-Dragon · · Score: 1

      I think sharp is a concept that really only applies to things on a macro-scale... even if dust is made out of diamonds, it's still not sharp.

    6. Re:Nano-pollution by Anonymous Coward · · Score: 0

      strangely the thought of assimilating with seven of nine isnt such a bad idea....

    7. Re:Nano-pollution by steveha · · Score: 1

      Correct me if I'm wrong here, but I thought diamonds were subject to cracking just like other materials. If you make a diamond-tipped saw, the diamond can flake off, especially when you cut really hard things, thus giving you little sharp chips of diamond.

      Yes, if you take a nail and try to scratch a diamond-tipped chisel, you will scratch the nail if anything. But if you start pounding on the chisel with a hammer, are you certain that the diamond will perfectly stay intact? I'm not.

      I just did a google search on "diamond-tipped saw" and I found a place that sells them. They claim that the diamond-tipped saw blades last 100 times as long as some other blades... they don't claim they last forever.

      steveha

      --
      lf(1): it's like ls(1) but sorts filenames by extension, tersely
  10. Inevitable Evolution of Explosive Growth by G4from128k · · Score: 5, Insightful

    Absolutely any thing that can self-replicate will be subject to the laws of evolution. So if some supposedly self-limiting replicator has any variants that can replicate faster (and pass on that variation), then that variant will become more prevalent. With each succeeding faster variant comes the potential for run-away population growth (to the limit of available resources). And any variant that can consume alternative resources (having consumed the initial set of resources ) will also become more populous. The result is the gray goo disaster that people fear.

    Attempts to build in self-limiting features (replication delay clocks, kill switches, error-correcting DNA ROMs, special only-replicates with a special nutrient, etc.) will only present an obstacle to evolution, not an insurmountable barrier. You can add 9s to the probablity that gray goo won't happen, but you can never get to 100% if self-replication is permitted.

    That said, you could also create a balanced nano-organism ecosystem with both predators and prey and boost human/animal/plant immune system to fight off nanoorganism attacks. (There is a reason that bacteria have never taken over the world.)

    --
    Two wrongs don't make a right, but three lefts do.
    1. Re:Inevitable Evolution of Explosive Growth by steveha · · Score: 4, Interesting

      The concept of grey goo is a nanite that can eat anything and build copies of itself. I'm not too worried about that.

      But it would be bad enough if someone designed a nanite that was very efficient at eating, say, grass and making copies of itself. Call it Nanite.MyDoom.A. Next is Nanite.MyDoom.B, that eats trees. Next...

      You know, I'm much more worried about humans designing bad nanites, than about nanites evolving in scary ways. If we design a nanite to make solid-diamond rocket motors by swimming around in a vat full of special chemicals, what are the odds it will suddenly evolve to be able to live outside the vat? Not too scary. (What was K. Eric Drexler's comment? It would be like our cars suddenly evolving to drive themselves and run off of tree sap instead of gasoline.)

      But nanites actually designed to live on their own in the wild could be just a mutation or two away from a "cancer" form that runs wild.

      I'm actually hoping that some large, responsible organization will release defensive nanites before the ability to make nanites becomes generally available.

      steveha

      --
      lf(1): it's like ls(1) but sorts filenames by extension, tersely
    2. Re:Inevitable Evolution of Explosive Growth by jfdawes · · Score: 1

      Just wondering if a Nanite complex enough to survive in the wild on it's own would be too big to be a Nanite.

      I think maybe I'm more worried that someone will genetically engineer some bacteria and give them machine tools.

      (Of course, the bacteria must hold some vague resemblance to sharks and the tools must be lasers attached to their heads...)

    3. Re:Inevitable Evolution of Explosive Growth by rcastro0 · · Score: 4, Insightful

      Absolutely any thing that can self-replicate will be subject to the laws of evolution. (...)

      The laws of darwinian evolution require random mutation as well as replication. Computer viruses, which are perfectly able to self replicate, for example, don't evolve. New computer viruses (virii?) are designed by someone and let loose, but old ones do not randomly mutate and transfer mutations down to descendents. They do not evolve into more efficient virii by themselves or by the laws of evolution you imply.

      --
      Quem a paca cara compra, paca cara pagará.
    4. Re:Inevitable Evolution of Explosive Growth by Saige · · Score: 2, Insightful

      There are already tiny self-replicating things out there in the wild.

      They're called bacteria. Amazingly, they've been around and evolving for billions of years. Yet, somehow, the planet has not already become grey goo (or black goo, or blue goo, or green goo, or what-goo-have-you). They're subject to all the various evolutionary pressures that you speculate would influence nanomachines.

      If grey goo were as likely as some alarmists have predicted, then I'd think it would have already have occured. The fact that it hasn't implies that there are some big obstacles to reaching the point that some replicating item could turn everything around it into copies of itself.

      To put it simply, I don't believe grey goo is something to worry about. A replicator accidentally being created with the ability to turn everything into identical copies just seems too unlikely. Now, perhaps black goo - deliberate creation of such a replicator - might be something to worry about. After all, I'd think it would take deliberate work to even have the possibility of such a replicator.

      --
      "You know your god is man-made when he hates all the same people you do."
    5. Re:Inevitable Evolution of Explosive Growth by meeotch · · Score: 1
      The solution couldn't be more obvious. We simply release wave after wave of Chinese needle snakes.

      mitch

    6. Re:Inevitable Evolution of Explosive Growth by Anonymous Coward · · Score: 0
      seems too unlikely. Now, perhaps black goo - deliberate creation of such a replicator - might be something to worry about. After all, I'd think it would take deliberate work to even have the possibility of such a replicator.

      I think we can count on it eventually intentionally being developed... for military uses, as a weapon (The next kind of WMD, perhaps)

    7. Re:Inevitable Evolution of Explosive Growth by AnonymousCohort · · Score: 1

      Computer Viri don't evolve ... yet.

      Just don't tell these guys.

      http://slashdot.org/article.pl?sid=04/02/06/1943 22 9

    8. Re:Inevitable Evolution of Explosive Growth by Anonymous Coward · · Score: 0

      ssssshhhhhhh!!!! don't tell anyone my plan! can't trust the public to keep ANYthing under wraps these days.

    9. Re:Inevitable Evolution of Explosive Growth by Anonymous Coward · · Score: 0

      (There is a reason that bacteria have never taken over the world.)

      What the hell are you talking about? Bacteria account for the vast majority of the Earth's biomass. The number of bacteria in your colon (just yours) outnumbers the population of humans ten to one.

      Bacteria rule the Earth. Complex life is a blip, an outlier on a bell curve composed almost entirely of unicellular life.

    10. Re:Inevitable Evolution of Explosive Growth by HeghmoH · · Score: 1

      Nature has done a really excellent job of building a large variety of self-replicating nanomachines. The way I see it, if none of them have managed to turn the world into gray goo or kill off all the grass or make an explosive precipitate at the bottom of any available lake, then it's probably harder than it sounds. Any human-designed nanomachine will be ripped apart by the fierce natural nanotechnological competition if it ever escapes into the wild.

      --
      Mod down posts with a "Free Mac Mini/iPod" sig, they're spam!
    11. Re:Inevitable Evolution of Explosive Growth by Anonymous Coward · · Score: 0

      "There is a reason that bacteria have never taken over the world."

      By many criteria, bacteria HAVE "taken over the world".
      1. More living species are bacteria than any other.
      2. More living cells are bacteria than any other.
      3. More pounds of living tissue are bacteria than any other.
      4. More cubic space is colonized by bacteria than any other.
      5. Even your own body has more bacteria cells rhan human cells within its skin.
      (3 & 4 depend on bacteria inside rocks at depth being as common as hypothosized, 4 depends on not counting air and space as colonized by humans, 5 refers to adults not babies.)

    12. Re:Inevitable Evolution of Explosive Growth by RealUlli · · Score: 1
      Actually, there is quite a load of green goo, floating around in our oceans. It's called plankton. Quite some fish (you might say almost all, at different levels of indirectness) feed off of it...

      Cheers, Ulli

      --
      Simple things should be simple, complex things should be possible.
  11. No! by Surlyboi · · Score: 5, Funny

    Nanobot Five is alive! No disassemble!

    --
    Mod me down and I will become more powerful than you can possibly imagine...
  12. Just Beautiful... by qat · · Score: 0

    Great, something more for me to learn in Chemistry...

    --
    Pls No Negative Modding!
  13. Nuclear power by G-funk · · Score: 2, Insightful

    This is disturbingly reminiscent of "nuclear power will give us clean limitless energy, and don't worry, we'll deal with the byproducts later because we'll have the tools by then."

    Hey cummon, nuclear power will provide us will clean limitless power, once we have fusion. And if the-powers-that-protest hadn't given the world nuclear such an ugly stain, we'd probably have it by now, as there'd be a shed-load more research being done.

    --
    Send lawyers, guns, and money!
    1. Re:Nuclear power by stratjakt · · Score: 2, Interesting

      Do the amount of damage that all the nuclear accidents over the years (chernobyl, 3 mile island, etc) even come close to the amount of damage the fossil fuel industry has done?

      --
      I don't need no instructions to know how to rock!!!!
    2. Re:Nuclear power by G-funk · · Score: 1

      Hell no... Ant the "etc" in "Chernobyl, 3 mile island, etc" isn't exactly a lot.

      --
      Send lawyers, guns, and money!
  14. Nuclear waste solution by BigMike · · Score: 2, Interesting

    So why can't the solution to nuclear waste disposal be as easy as this: Simply reverse the uranium mining and refining process, to where you're decomposing the material into less and less refined material, until you get to the point where you are mixing it with 1000's of tons of dirt and putting it back into hugh open pits ... Shouldn't cost any more than getting it in the first place ...

    1. Re:Nuclear waste solution by gordguide · · Score: 2, Informative

      I'm frankly not sure where to start. Let's start at the end.

      "Shouldn't cost any more than getting [uranium ore] in the first place."

      And what do you suppose mining uranium costs? Yellowcake currently sells for about $10 a pound, and at that price the world's uranium producers are making a very decent profit.

      I know many dozens of people in the industry from exploration crews to miners to management.

      By "Reversing the mining process" I assume you mean burying it in the ground. Well, that's exactly what they're trying to do, but they do run up against a few probems. For example, if you don't use uranium ore for something, there's no point in mining it in the first place.

      But, if you do use it, you inevitably turn it into something much, much more radioactive than the stuff we get out of the ground.

      North Korea isn't trying to make bombs out of the stuff that goes IN to the reactor, they make it out of the stuff that comes OUT after they're done using it to boil water and run a steam generator to make electricity.

      Different reactor designs vary so the quality of the waste varies as well. But, it's always more dangerous than the stuff that comes out of the ground.

      There is more than one type of power-generating reactor that eat uranium, breathe electricity, and shits weapons-grade plutonium two years later. (Thankfully N Korea doesn't have one of those designs, so they have to jump through a few hoops first. But, they have a good start with the waste fuel from the type of power reactors they do have).

      There is one sure-fire way to make radioactive material safe. It's called the passage of time. Ever handle a piece of lead? Well, a couple of billion years ago, it was uranium. All uranium eventually turns into lead.

      So, if I understand you right, you're saying we wait a billion years until the waste we have is more-or-less the same as the stuff we took out (by then plutonium might decay enough to be similar to yellowcake), and then we bury it.

      Gotcha.

    2. Re:Nuclear waste solution by Waffle+Iron · · Score: 2, Informative
      You need to understand the concept of half-life. The radioactive U-235 that we mine has a half-life of hundreds of millions of years. We put that in a reactor, and smash it up into bits that have half-lives of decades or centuries.

      The amount of radiation emitted by a mole of material is inversely proportional to its half-life. Thus, the stuff you put in the ground is a million times more radioactive than what was pulled out.

    3. Re:Nuclear waste solution by Anonymous Coward · · Score: 0

      I think what the parent might have been saying is - why don't we break down the used uranium back down into dust and mix each single dust particle of uranium with a kilogram of dirt and thus disperse the radioactove material over a wide area - to average the total radiation over a very large volume. Just like how it was before it was mined.

    4. Re:Nuclear waste solution by Waffle+Iron · · Score: 1
      Because, as I pointed out, it's not uranium any more. It's many orders of magnitude more radioactive, so putting it back doesn't make it just like how it was before it was mined.

      Not to mention that before it was mined it was probably locked up in solid rock; mixing it into loose dirt isn't exactly a good way to immobilize it.

    5. Re:Nuclear waste solution by Artifakt · · Score: 1

      Right, but it's many orders of magnetude more radioactive because it is decaying many orders of magnetude faster. It can't be emitting a lot of radiation and not decaying fast at the same time.
      A fleck of Fermium or Mendelyevium big enough to see with the naked eye will emit enough radiation to kill you in minutes at 10 yards. However, its half life is a small fraction of a second, so it won't stay that hot long enough for you to get it out of the particle accelerator where it was made and get exposed to it.

      --
      Who is John Cabal?
    6. Re:Nuclear waste solution by Waffle+Iron · · Score: 1

      I know that. I was ignoring the really short lived waste; these go away as the spent fuel cools for a few years at the plant. I was talking about the isotopes that decay in a few decades or centuries; we don't have time to just sit around waiting for that to decay. This component of the waste still accounts for many orders of magnitude more rate of radioactivity than the original ore.

    7. Re:Nuclear waste solution by Artifakt · · Score: 1

      That's a more legitimate point. Something that is roughly middle of the road on potential lethality levels, but will be around long enough for records of just where it was buried to get lost, people who handled it to retire, and so on, has some real problem causing potential that does need addressed. If I wasn't already in the thread, I'd give you a +1 insightful point, if I had any points.
      What you're describing there is a seperate issue, and maybe a more significant one, from concerns such as marking a long term waste dump so that even the total collapse of western civilization won't create a risk, or the issues surrounding spent fuel recycling. I'm not sold on your arguement yet, but it raises an interesting set of questions.
      Is there some isotope, that particularly fits most or all of the following parameters? 1. Has a half-life of, say, 1 to 25 (or maybe 50) years. 2. Emits an energetic gamma in at least one of its major decay paths. 3. Will be found in industy nuclear waste in amounts much greater than there are any current uses for. 4. Is financially far from a break even point if we tried recovering and reusing it. 5. Has some particular problems besides being hot (i.e. its decay products include a gas that embrittles our best container technology, or it's chemically very toxic).
      Possibly, there are some particular isotopes that have many or all of these problems at once. Those sound like the core of the problem, as you're describing it.

      --
      Who is John Cabal?
  15. yeesh! by JeanBaptiste · · Score: 1

    Assembling , Disassembling , why havent we taken over the world yet? for one million dollars?

  16. This is idiotic by MarkusQ · · Score: 4, Informative

    and argues for what he calls the 'Law of Disassembly,' that 'every MNT product must be disassemblable by at least one [of several possible methods].' The article ends with some good suggestions for raising awareness of this important issue. Gratuitous quote: This is disturbingly reminiscent of "nuclear power will give us clean limitless energy, and don't worry, we'll deal with the byproducts later because we'll have the tools by then.

    This is idiotic. Any reasonable MNT device will be mostly carbon in a form very like diamond. Yes, diamond is cool; it's hard, light weight, etc. But it isn't some SciFi ubermatter. For instance, it burns pretty much the same way coal and graphite do.

    As for the products of MNT, it depends a heck of a lot on what is beeing made. Is he seriously suggesting that we shouldn't be allowed to use MNT to produce clean drinking water for third world countries unless we have a way to disassemble it? Or he just techo-fearmongering without bothering to be serious?

    I will agree though, it is disturbingly reminiscent of the FUD that was spread about nuclear power by the fossil fuel industry that has done so much for the environment (not to mention world peace).

    -- MarkusQ

    1. Re:This is idiotic by Anonymous Coward · · Score: 0

      "...to produce clean drinking water .."

      worked in army as a mechanic for osmose filters(very clean water indeed), we had to add bacteria to the water, if we didn't the locals would get real sick/ill because their stomach is adapted to their surrounding bacteria levels(yes, they piss upstream and drink downstream)

      Your remark shows you are very insensitive and uninformed.

      and fear-mongering is reserved for your president only
      Besides
      Those people do not need your help, they need for your country to stop bombing theirs.

  17. practicality by TheSHAD0W · · Score: 3, Interesting

    We don't even really know how to build nanobots and already we're talking about failsafes. I agree that adding a failsafe is a good idea, even in a nanobot that can't replicate, but unless you know how you're going to build something you can't know the best way to throw a wrench in the works. It may not even be possible to add a particular failsafe to a nanobot because of engineering constraints. First build a few, THEN figure out where to stick the self-destruct.

  18. Not quite. by TheSHAD0W · · Score: 1

    Current organisms are DESIGNED to evolve; DNA and its replication system are subject to all sorts of interesting errors, and there are even mechanisms in place that control the error rate. A mechanical replicator can be designed with sufficient redundancy that it would be practically impossible for evolution to take place.

    1. Re:Not quite. by tc · · Score: 1

      Organisms are not DESIGNED to do anything. They EVOLVED that way. That includes evolving optimal replication error rates (if a mutation resulted in too little or too few future mutations, that strain dies out or stagnates).

      I think once you have replication, the possibility of at least some mutation occuring, albeit very infrequently, and an environmental selection mechanism, then you have all the ingredients for evolution to occur. That doesn't mean these things are going to evolve into something interestingly different overnight, but if they were allowed to evolve over millions of years, I'm sure plenty of stuff would emerge.

    2. Re:Not quite. by Artifakt · · Score: 1

      Actually, there's reasons to think that a low rate of errors makes evolution proceed faster (Counter-intuitive though that sounds). Very infrequently is good.
      Nature doesn't seem to be "trying" to avoid evolving better copying, it's just gotten as good at it as it can, and there's only so much one can do to avoid errors with a chemical encoding method, when most of those errors proceed from more fundamental physics. (In simpler words, when a carbon 14 atom that is actually part of a DNA molecule decays, or a stray gamma ray knocks the crap out of everything, there is no chemical way to stop a transcription error from occuring).
      Nature is often perfectly cool with stagnation. A lot of bacterial forms have been unchanged for more than a billion years, and if those cute, cuddly little Coelicanths want to swim around looking just like their ancestors of 500 million years ago, nature sometimes decides that's just fine, and coos over them.

      --
      Who is John Cabal?
  19. Some useful methods by -dsr- · · Score: 4, Interesting
    Several methods spring to mind immediately as useful safeguards:
    • Sunlight-intensity ultraviolet light - your nanite is only usable in the dark because UV breaks a chemical bond necessary for functioning.
    • Dissolves in moderate acid - pouring a cup of strong vinegar ought to lock up the bugs. In fact, requiring a narrow pH range is a good idea in itself.
    • Requires an environmental nutrient - how do you get power to nanites anyway? Make them dependent on a fuel that has to be added to their environment.
    • Requires an unusual temperature - if they need oven-like temperatures to function, there's not much danger keeping them at roomtemp


    Just a few thoughts. Basically, if you keep the nanites dependent on an unusual environment or disrupted by an easily-achieved environment, you'll be going a long ways toward preventing a grey goo disaster.
    1. Re:Some useful methods by Anonymous Coward · · Score: 0

      unless you make them self replicating.

    2. Re:Some useful methods by Jerf · · Score: 2, Interesting

      LOL, you act as if these features are going to have to be designed in, rather then designed out!

      Nanotech bends a few of the rules, but it doesn't bend all of them. While you can make nano-scale machines hard to physically destroy, it's going to be a lot of generations before we have a machine that is still "nano", and can function in direct sunlight, a wide range of pH, and a wide range of temperatures. (It is unlikely that we'll ever get away from "environmental nutrient" as a requirement, ever; that's a fundamental effect of the Second Law of Thermodynamic. An energy source is strictly required in order to do any work.)

      I can imagine machines that may meet those criteria but to get to the point where the machines don't instantly die in sunlight (a rather dangerous thing; there's a reason the sun touches almost nothing on us that isn't already dead), you're probably going to have to leave "nano" and get up to merely "micro". You simply need some amount of mass just for the thermal inertia, so the slightest thermal impetus doesn't send you directly to thermal death.

      (Same goes for EM concerns as well; truthfully, I'm still skeptical (albeit in the open minded sense) that what we're all thinking of as "nano" machines (machines in the thousands or merely millions of atoms) will ever work outside of a Faraday cage; it remains to be see, I guess.)

  20. one answer: teleportation by victorvodka · · Score: 1

    it will be great when i can email myself to paris or mars or make a xerox of myself before getting risky surgery or going skydiving. that's all, really.

    --

    The flag just makes more sense than the constitution. - Judas Gutenberg

    1. Re:one answer: teleportation by jfdawes · · Score: 1

      Only problem with this is that you still die.

      Some other guy that looks remarkably like you doesn't.

      And if you're the xerox, you don't remember going sky diving... or you still need risky surgery...

  21. Industrial revolution by wurp · · Score: 4, Interesting

    If we can get a nanobot that can make a basic computing element, a basic structural element, and a basic actuator element, as well as reproduce itself, from water and air (carbon, hydrogen, nitrogen, and oxygen, the same stuff you and diamonds are made of) it would make the industrial revolution pale by comparison.

    Imagine having a factory unit that fits in your hand and with a supply of air and water it could make more of itself or make any structure or electronics gizmo you have a program for. Connect yourself to the internet and get free programs to build housing, greenhouses, furniture, computers, wireless nodes for the new internet, cars, solar cells, all without significant human intervention and costing nothing more than water, air, and power, or for the extra cheap using only your own solar cells.

    This is the extremely conservative vision, assuming that we will only be able to produce a few basic things with nanomachines (but assuming we can build a nanofactory that reproduces itself), not assuming we will be able to make foodstuffs, cybernetic enhancements, or any of the obvious things that would be handy to have as microscopic machines (blood cleaning & oxygenating machines, cancer finding & eating machines, machines to be the roto-rooter to your clogged arteries, etc).

    Oh yeah, and once the technology is mature enough that a self-reproducing version escapes the lab, imagine getting all of this for next to nothing, and giving them away to your friends just because it costs you basically nothing to do so. Oh yeah, and don't forget to save the third world while you're at it.

    And don't forget, that's the conservative vision. I cannot imagine that within the next 50 years we won't have nanomachines that do that. If we can avoid everyone killing everyone else in the power struggle that ensues, we will be trading in virtually all of the old problems that aren't social for new ones.

    1. Re:Industrial revolution by Anonymous Coward · · Score: 3, Informative

      I wouldn't consider that vision conservative in the least.

      Considering it is imposssible to create macrobots that can reproduce themselves, the prospect of microbots that can do it is practically inconceivable to me.

      As a chemist who works in the area of nano-composites and nano-patterning the smallest self replicating robots I can imagine already exist...they are called single celled organisms. The chemistry involved in making nanobots is equally as complicated as that of organic life, no matter what element you make them out of. Speaking from a chemical perspective, the intellectual demands of creating a new type of what is essentially life from scratch (without using organic molecules) are way more than 50 years away.

      My advice to computer scientists and engineers is to concentrate on macro sized robots that can reproduce themselves from base materials (such as sand). This is not as easy as it sounds! Such robots could easily build houses and other things such as solar panels etc., and are much more realistic in a 50 year timespan.

      yay.

    2. Re:Industrial revolution by Anonymous Coward · · Score: 1, Interesting
      ideals vs social status quo.


      its an age old argument, sure itd be great to have everything for next to nothing, but its sure going to upset the power base for the rich and wealthy elite if you dont have to pay for anything anymore people will fight something like this, even if it will benefit everyone, after all, a king with no subjects is not much of a king.. non?


      dms0

    3. Re:Industrial revolution by Saeger · · Score: 1, Interesting

      Don't forget that nanotech isn't the end-all be-all tech that may kill us - AI will be advancing alongside nano and other tech on our way to Singularity.

      --
      Power to the Peaceful
    4. Re:Industrial revolution by HeghmoH · · Score: 1

      Considering it is imposssible to create macrobots that can reproduce themselves, the prospect of microbots that can do it is practically inconceivable to me.

      I'm sorry, what? You are a self-replicating macrobot. (Well, ok, you are self-replicating given a fertile member of the opposite sex.) Nature is full of self-replicating machines of all sizes. By example, we know that it is physically possible to construct self-replicating machines at least as small as the smallest bacteria and at least as large as a blue whale.

      --
      Mod down posts with a "Free Mac Mini/iPod" sig, they're spam!
    5. Re:Industrial revolution by StuartLaJoie · · Score: 1

      Imagine having a factory unit that fits in your hand and with a supply of air and water it could make more of itself or make any structure or electronics gizmo you have a program for. Connect yourself to the internet and get free programs to build housing, greenhouses, furniture, computers, wireless nodes for the new internet, cars, solar cells, all without significant human intervention and costing nothing more than water, air, and power, or for the extra cheap using only your own solar cells.

      I just want to point out the obvious downside to this concept. Joe Sixpack jumps online and finds the source for a great new house, but, being Joe Sixpack, he doesn't know how to check the source for bugs and doesn't realize until it's too late that the program was written by some script kiddie who slipped a recursive loop into the instructions and he's covered an entire city block with his dream house, and he can't stop it. If the factory unit builds from available air and water, how do you shut it down? We see everyday that non-technical people are taken advantage of in similar ways. (MyDoom, etc.) Even if the thing has a giant red button that says OFF, a minority of people will still be so freaked out that they wouldn't remember to hit it.

      This is the extremely conservative vision, assuming that we will only be able to produce a few basic things with nanomachines (but assuming we can build a nanofactory that reproduces itself), not assuming we will be able to make foodstuffs, cybernetic enhancements, or any of the obvious things that would be handy to have as microscopic machines (blood cleaning & oxygenating machines, cancer finding & eating machines, machines to be the roto-rooter to your clogged arteries, etc).

      Back to our theoretical script kiddie. Let's say this kid is the same sort that releases highly damaging worms into the wild. What happens when he gets angry at the jocks at his school for picking on him and releases a nanobot that, instead of finding and eating cancer, has been modified to find and eat cardiac tissue or red blood cells? Or worse yet, the domestic terrorist who, angry about trucking regulations, releases a bot into our water or food supply that lies dormant until it comes into contact with another bot released after certain demands aren't met, or perhaps just activates after a certain date, etc.?

      I'm not trying to be a Luddite about this, but our safeguards are far from reliable to prevent these sorts of things, and even in the article we see that safeguarding against possible problems is not at the forefront of the nanotech wave. (Quoted: "Most nanotechnologists whom I talk to say that disassembly is a great idea but not practical in the near future.")

      If, in fact, your estimates are conservative, we should all be scared silly. Innovation in any tech should be tempered with thoughts to what could be done with it, and safeguards should be put in place to keep damage to a minimum, and in the case of nanotech, this doesn't appear to be happening. Again, I don't mean that it should be locked down to all but a chosen few, or draconian security measures taken, but we should think responsibly about the final uses of what we build. If we're going to put the equivalent of a nuke in everyone's hand, we should at least have a way to slow the initial blast.

      --
      FrontDoor 2.02; Noncommercial version Press Escape twice for...
    6. Re:Industrial revolution by Thomas+Shaddack · · Score: 1
      Can the single-cell organisms be turned into nanofactories, very similar to the way GM bacteria now produce eg. insulin? Why they couldn't produce the proteins that would self-assembly, like viral capsidas, into engines and even complete microdevices? Inject DNA or RNA into the cells the way viruses do, let the cells produce the desired nanodevices or nanoparticles as a "byproduct" of their life, while reproducing themselves? Can the nanodevices then carry their own blueprint in the form of a packed strand of nucleic acid, destined to be reproduced when a suitable host cell is found, again in a viral fashion?

      Not exactly a safe thing to do, but amusing to ponder.

  22. Quite.... by mulescent · · Score: 1

    You have to keep in mind that the "mutation rate" of a nanite would be subject to evolution as well as all of the other morphological features discussed earlier. Nanites designed to replicate with 100% fidelity could easily evolve to mutate at a constant, favorable rate. It might take a million generations, but if the doubling time for the nanites is on the order of seconds or minutes, a million generations isn't inconcievable.

  23. Oh, heck - terrorist disassemblers by dpilot · · Score: 1

    Nuff said.

    Terrorist unleashes rogue disassemblers. Biggest obvious threat would be structures, as you say. But IMHO the more logical early use of nano would be medical diagnosis and implants. (There's already the M2A camera, named for the ingress and egress points.) Imagine unleashing disassemblers on diabetics with nano-based implanted insulin dosers, or cancer patients with nano-based, self-targeting chemo dosers. In the former case, they'd probably figure out something's wrong soon, hopefully before going hypoglycemic. In the latter case, they may not know anything's wrong until finding that their cancer therapy has been completely ineffective.

    --
    The living have better things to do than to continue hating the dead.
    1. Re:Oh, heck - terrorist disassemblers by Artifakt · · Score: 1

      That's not likely to be a goal of the present crop of terrorists, unless they know of some specific political figures with a targetable medical condition. On the other hand, a new crop of Marxist types might well want to target new medical breakthroughs, as a way of aiming at the "Oligarchs". "Greens" with terrorist ambitions might see this as a version of infrastructure hits.
      Short form, we shouldn't be worried about the next generation of UBL'oids thinking along these lines, but that still leaves the next Unabomber.

      --
      Who is John Cabal?
  24. NO disassemble by LupidStupy · · Score: 1, Redundant

    No disassemble number5!!!!!!!!

  25. we WILL know how to decommission them by drinkypoo · · Score: 4, Interesting

    From the article:

    Why can't this discussion wait? Here's why: Primitive non-MNT nanotechnologies are already creating products that cannot yet be disassembled in such pathways. Complex coatings and integrated nanomaterials that are hard to take apart are being manufactured now, albeit in smaller quantities that so far have negligible impacts. We can't blindly continue to say that someday we'll know how to decommission them.

    We will know how to decomission them. This is not to say that it will be easy, or that the results between then and now will be pleasant, which if anything is the argument for this "law". (I think a "law" should be something that cannot be sidestepped. This is more of a rule that we wish would be a law. If anything, call it an edict. If you can get anyone to call it anything.

    Backing up a bit,

    This is disturbingly reminiscent of "nuclear power will give us clean limitless energy, and don't worry, we'll deal with the byproducts later because we'll have the tools by then."

    Another problem which should be easily solved by sufficient advances in nanotechnology :) You can take the stuff apart bit by bit and do whatever must be done to make it entirely safe. Also, it should let you build sufficiently advanced machines not necessarily small ones) to stop and contain a meltdown, should something that unnecessary occur. I think that the advances in materials technology would allow that, especially given a reasonable design to start with. I might be wrong here, but in general it does seem like something you could do. I know this is a broad dodge sideways but the real issue with nanotechnology is that someone somewhere who really should not have their hands on nanotechnology will one day get it. Arguably, the military or government of any current world power would be a bad force to have in control, but I guess it's inevitable and it will be better than some. Nothing could possibly be better or worse, however, than a lone genius who believes that it's their right to decide for everyone what path to take, with that kind of power.

    Given that it's bound to happen eventually, what can we do about it? The author is talking about a convention that he's expecting people to follow. Well, they won't. At the very least some military and paramilitary organizations, who will have nanotechnology, will use it without any controls like this whatsoever. Therefore, at the very least, organizations like this are going to be interested in the proper disassembly of these items. In short, the stuff of a large number of science fiction novels, and very peripherally, one or two episodes of a certain television show that had way too many episodes and changes of neckline.

    Aristoi, a book by Walter Jon Williams contains a lot of material on this topic. I haven't read any of the "official" literature on this topic but it sounded, at the very least thoughtful, and it was pretty entertaining. The question of how to make maximally efficient nanomachines while still keeping them under control, which is to say physically contained, at least during testing, is definitely of great interest.

    Regardless, we will have to know how to decommission them. Therefore we will know, or die trying to find out. I know it sounds overly dramatic, but it is certainly a real issue.

    --
    "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  26. food for thought by benjonson · · Score: 3, Informative

    This monster called technology is a force we have to deal with. "Deal with" being the operative words: it is not something we control, at least not anymore. It is way too big, powerful, and important to be arbitrarily restricted, and any efforts to implement controls would have to be quick, effective, and global, i.e., practically impossible. In light of this, what the author of the article proposes is eminently reasonable and foresighted.

    There has been much talk of the dangers of nanotech, for example from Bill Joy and others, and it is, or should be, a point well-taken. What the author proposes is twofold: when designing replicable nanotech devices, implement constraints on reproduction rates, and second and probably most important, design in disassembly through, for example, the ability to take the thing apart, or by biodegradabilty, or by oxidation susceptibility. In other words, prepare in advance an "achille's heel" that would allow a dangerous development to be easily disabled. I would only argue here that mutliple achille's heels should be designed in.

    And, to quote from the article (yup, I read it, sorry):

    Why can't this discussion wait? Here's why: Primitive non-MNT nanotechnologies are already creating products that cannot yet be disassembled in such pathways. Complex coatings and integrated nanomaterials that are hard to take apart are being manufactured now, albeit in smaller quantities that so far have negligible impacts. We can't blindly continue to say that someday we'll know how to decommission them.
    No doubt there is much to argue with and discuss at this point, but that is the whole idea - let the discussion begin. The future is coming and the time to plan for it is now.
    --
    =-+
  27. Reminiscent of Benford's Galactic Center series by dpilot · · Score: 1

    ************SPOILER ALERT*********

    Sentient mechlife (robots) has proliferated in the galaxy, and are driving biological life, including humans, toward extinction. Eventually it's discovered that there's a backdoor in the mechlife that rips through their 'sentience net' killing most of them and giving bio-life a chance to come back. Kind of a cross between disassemblers and the Iraqis' French Exocet missiles during GulfWarI.

    --
    The living have better things to do than to continue hating the dead.
  28. Speaking of Nuclear Energy... by mosb1000 · · Score: 2, Interesting

    We have ling since developed the capacity to reprocess and dispose of nuclear waste. And by dispose it of I don't just mean bury it in the ground. Breeder reactors and processing facilities that can turn high level radioactive waste into fissionable material and useful radioisotopes have been around for more than a decade. The DOE site at the Idaho National Engineering and Environmental Laboratories alone could reprocess all the nuclear waste generated in the US, and well as by our NAVY. It is only the mindless fear of nuclear proliferation that prevents us from using it to do so.

  29. RTFA ? This is a summary by rcastro0 · · Score: 1

    1. There are many ways to "disassemble" something.
    1.a. You can take something apart element by element.
    1.b. You can make it biodegradable.
    1.c. You can incinerate it.

    2. (1.a), (1.b) and (1.c) should be incorporated into a law which will be called "Law of Disassembly", which says every MNT product must be disassemblable by at least one of these three alternatives.

    Well... Easy, then to have a MNT pass the "Law of Disassembly". Throw MNT in question in a high temperature furnace, prove it gets destroyed (thus disassembled), the end. What doesn't burn (or melt, or vaporize, disassemble) when the temperature is high enough ?

    I know there is an important point hidden in the article (e.g. maybe some rule relating speed of reproduction and clocking of self-destruction). But this "Rule of Disassembly", as stated, seems empty by stating "MNTs should not last forever" -- nothing does.

    --
    Quem a paca cara compra, paca cara pagará.
  30. Dumb example by SuperBanana · · Score: 1
    What was K. Eric Drexler's comment? It would be like our cars suddenly evolving to drive themselves and run off of tree sap instead of gasoline

    Cars are made of hundreds of thousands of parts and hundreds of materials. Cars are not designed to build things, much less themselves.

    Ergo...stupid example.

    1. Re:Dumb example by Artifakt · · Score: 1

      Anything self replicating is also made of hundreds of thousands of parts, or more. Usually, they're called genes and proteins. Cars are also capable of some elements of reproduction - a car CAN typically transport all of the parts to assemble another car to bring those parts together in the same location, even if it has to make several trips - cars ARE quite deliberately designed to do some stages of building themselves, and not to have anything to do with other stages.
      Cars exist in small numbers. There's not even a billion (American units) of them in the world today. Complex life apparently developed from simpler molecular compounds in the seas of the early Earth. These compounds were just as far from true reproduction as cars at one point, but they were two dozen orders of magnetude more numerous, had processes replacing them if they got broken down, and had half a billion years to get lucky once.
      What looks absurd for a few hundred million cars over a hundred years, (especially from the viewpoint of the car's self aware external support systems that could consiously choose to withdraw that support), looks inevitable for 10E26 cars with an automatic support system called nature, over half a billion years.

      --
      Who is John Cabal?
  31. Science marches on... by Klatoo55 · · Score: 2, Insightful

    Although the grey goo is a problem that is constantly hovering about the use of nanotechnology, we have to consider that we have other far more developed methods of mass destruction. Nuclear, radiological, and especially biological weapons are potentially as destructive as the goo, and require far less technical expertise to manufacture and distribute. More troubling, they allow us to be destroyed with current technology, rather than a bothersome wait for nanotech to catch up. On the bright side, those suicidal people that feel the inclination to do away with all of us are a bit psychotic and thus less able to organize something like a mass release of a weapon of mass what-have-you. I'm not worried about anything besides the price on the first tickets up that space elevator.

    --
    ------- "A true friend stabs you in the front." -Eliot
  32. A few Kilograms... by mosb1000 · · Score: 1

    A few Kilograms of Radioactive waste is more dangerous than a few kilograms of concentrated chemical waste. This is because besides being radioactive, radioactive waste is very toxic chemically. Of course for your comparison you should have been been comparing a few kilograms of radioactive waste to a few million tons of concentrated chemicals since it doesn't take much uranium to produce a lot of power.

    1. Re:A few Kilograms... by hazem · · Score: 1

      Don't forget that some of that coal is made of carbon-14, rather than carbon-12. So in burning tons of coal, one is, indeed, releasing radioactive particles into the air. That's not to mention other stuff in the coal (though I doubt there would be much uranium) that might be radioactive or otherwise harmful.

      It would be interesting to compare amounts of uncontained/released radioactive waste that gets into the environment from both processes.

    2. Re:A few Kilograms... by WalksOnDirt · · Score: 1

      The half life of carbon 14 is 5700 years. Coal has been in the ground for millions of years; there is no significant carbon 14 in coal.

      --
      a,e,i,o,u and sometimes w and y (at be if of up cwm by)
  33. Nanomaterials vs. Nanorobots by mulescent · · Score: 4, Interesting

    A crucial distinction that is not being made in this discussion is the one between nanomaterials in general and nanorobots particularly. It is possible that one day we will be able to build functional nanobots that can live freely and replicate. We can cross that bridge when we come to it.

    What is more relevant and has been less well-discussed by /. is nanomaterial remediation. Carbon nanotubes are very tough and have been demonstrated to be very toxic in mice . Thought has not been given about how to dispose of materials such as these without creating a public health hazard. It is clear that nanomaterials will be used in greater and greater quantities due to their exceptional properties. Therefore, we can work to solve the inevitable disposal problem now or later. It will cost less to address disposal now.

    1. Re:Nanomaterials vs. Nanorobots by Magada · · Score: 0

      rtfa! they proved very toxic (i.e. caused extensive damage) when washed through said mieces' lungs. In layman's terms, this means mieces were drowned in a liquid which contained nanotubes among other things, and then were found to die from this treatment, and their lungs found to exhibit massive trauma in the post-mortem. Now how scientific is that?

      --
      Something bad is coming when people are suddenly anxious to tell the truth.
  34. I, for one, welcome our new Gray Goo Overlords! by Nova+Express · · Score: 1, Funny
    Sorry, had to be said. ;-)

    --
    Lawrence Person (lawrencepersonh@gmailh.com (remove all "h"s to mail)

    http://www.lawrenceperson.com/

  35. mod parent up by mike3411 · · Score: 1

    (if you've read the article)

    --
    Mod me down, and I will become more powerful than you can possibly imagine!
  36. {funny} Nanotubes in the future by Anonymous Coward · · Score: 0

    Ironically, all disassembled nanotubes will end up in a one inch square box in a cave in Nevada.

  37. Planned Obsolecense by Anonymous Coward · · Score: 0

    While there are many valid points in the nano-waste camp, this reaks of planned obsolecense. You can't build a perfect DVD player because 1. it's too expensive to compete. 2. Who buys a new widget when the old one has been operating perfectly since you bought it.

    I was regailed with the tail of "stainless steel" piston sleeves developed and tested by GM then sold to a european company for their high-quality line. Because the American company was more ruthless (as if) and had their eye on the new car every 5 years market. OK bad example.

    While this may be entirely urban legend I've seen the "fish-caps" at work (fish oil elecrolytes in capacitors which inevitably fail in the majority of camcorders equiped with them over time). They might just be a series of bad decisions or someone said, hey we can underprice our competitors then sell tons of parts just outside of warranty and/or sell new equipment.

    Whatever I'm offtopic, troll me.

  38. Bah. Without mutation *we* wouldn't be here... by NotQuiteReal · · Score: 1

    In a blink of the eye (on the cosmic scale) this planit is toast.

    --
    This issue is a bit more complicated than you think.
  39. We did it! by Brandybuck · · Score: 1, Insightful

    "nuclear power will give us clean limitless energy, and don't worry, we'll deal with the byproducts later because we'll have the tools by then."

    And we did it too! We now have ways to safely dispose of nuclear waste. Unfortunately, the politics of the situation means that we are forced to continue storing it in leaking metal drums...

    --
    Don't blame me, I didn't vote for either of them!
    1. Re:We did it! by Anonymous Coward · · Score: 1, Informative

      Read more...we didn't just yet,

      but what would you care, its your grandgrandgrandchildrens problem now isn't it?

  40. No Disassemble! by Noxx · · Score: 1

    Number Five Aliiiiive!!!

    Amazing what you can find hiding the cobwebs of your mind, isn't it?

    --
    Study everything, you'll find something you can use - Jason Bourne
  41. Disassemble? by da3dAlus · · Score: 0, Redundant

    Disassemble, dead.
    No disassemble Johnny 5!

    --

    Sometimes I doubt your commitment to Sparkle Motion.
    1. Re:Disassemble? by toxcspdrmn · · Score: 1

      Shouldn't that be "No disassemble number 5e-9"?

      --
      "E pur si muove!" - attributed to Galileo Galilei, 1564-1642
  42. The first corollary of reassembly by Anonymous Coward · · Score: 0

    For every n components removed during dissasembly, precisely n-1 components will be returned to their places during reassembly.

    1. Re:The first corollary of reassembly by Artifakt · · Score: 1

      That's easy to fix, just don't design your nano with pocket screws.

      --
      Who is John Cabal?
  43. Nuclear waste issue and The Bomb by Latent+Heat · · Score: 4, Interesting
    Part of the Yucca Mountain fiasco has to do with President Carter's decision not to reprocess spent nuclear fuel rods -- the idea was to do a once-through fuel cycle, leaving the spent fuel rods chock full of radioactive, yes, but potentially valuable chemicals and radioactive elements. Heck, there is still a lot of usable uranium (not all U-235 in the partially-enriched fuel is "burnt up") in those rods not to mention plutonium, radioactive strontium that could be used for an atomic heat source (the Russians did that kind of thing that feeds into "dirty bomb" scares).

    Now President Carter has had his share of critics, but his worry about reprocessing is opening up more avenues for diversion of atomic materials and making the Bomb available to more people. Yeah, yeah, the plutonium that is cooked in a LWR is the wrong isotope for the Bomb compared to the plutonium cooked for shorter times under different conditions up at the old Hanford reactor. I guess there is some controversy as to whether with enough technical smarts you could make a bomb from LWR plutonium.

    I say we forget about Yucca Mountain and just store the spent fuel rods "on site" and build more storage, whether it is more "swimming pools" or perhaps "dry cask storage."

    OK wait, would everyone here agree that compact fluorescent lamps (CFL's) are a Good Thing -- saving on coal and nuclear power and saving the Earth and everything? Is there any Amory Lovins disciple out there with anything bad to say about CFL's? Guess what, they have mercury in them, and no, they don't last forever -- I have had enough of them long enough to see them burn out. For years, the City of Madison wouldn't take them in the garbage, telling us to pile them up in our basements. Oh, and I have dropped more than one of those things, so I suppose I am brain damaged from the mercury by now.

    The City of Madison now collects CFL's and fluorescent tubes if you wrap them and separate them from other garbage -- have no idea what happens to them. I say lets just stockpile spent fuel rods until some future markets develop for what is in them.

    1. Re:Nuclear waste issue and The Bomb by 4of12 · · Score: 1

      Now President Carter has had his share of critics

      His biggest liability was that he couldn't delegate properly (because of staff bickering, he ma.

      On the plus side, apart from his humanitarian effors, because of his nuclear submarine background and training he was the only president that knew what a Bessel function was.

      --
      "Provided by the management for your protection."
  44. nuke byproducts:we DO have the ability to deal by aaron_pet · · Score: 1

    This is disturbingly reminiscent of "nuclear power will give us clean limitless energy, and don't worry, we'll deal with the byproducts later because we'll have the tools by then.""

    Umm... We DO have the ability to deal with it..
    Breeder Reactors...
    I believe that France uses them... and they have a good power system.

    But Breeder reactors are illegal or something.

    Arn't I great at sourcing?

    --
    Please use [ informative / summarizing ] SUBJECT LINES
    Flame me here
    1. Re:nuke byproducts:we DO have the ability to deal by GISGEOLOGYGEEK · · Score: 1

      Actually Canada is a world leader in breeder reactor technology and has tried to work with the US and Russia in using the reactors to dispose of plutonium from decommissioned nuclear warheads.

      Unfortunately too many green organic people out there would rather have those warheads sitting around waiting to be stolen by Osama rather than let them be transported across borders to the reactor sites. The media has made them scared into thinking transportation is too dangerous.

      I am not in favour of nuclear energy, there are too many by products that can't be disposed of safely, but I am very much in favour of using canadian breeder reactors to rid the world of as much plutonium as possible.

      --
      George Bush + Linux = "I will not let information get in the way of the fight against Windows"
  45. Re:Clarify? by acxr+is+wasted · · Score: 3, Insightful

    What's interesting about the protests about the project is that the political types that represent the area where the hole is are fine with the project... it brings plenty of jobs to their area, and they're convinced of the safety.

    You are so fucking wrong it boggles the mind. I'll challenge you to read this article and think before you support bullshit like this in the future.

    And as a resident of Las Vegas, may I personally say, fuck you.

    --
    "Come on, let's go drink till we can't feel feelings anymore."
  46. Nuclear waste can be handled by breeder reactors by leereyno · · Score: 1

    A difficult but viable solution to the problem of nuclear waste has existed for decades. It has not been implemented for political reasons ranging from the politics of the cold war to the current politics of environmentalism.

    http://www.npl.washington.edu/AV/altvw79.html

    --
    Muslim community leaders warn of backlash from tomorrow morning's terrorist attack.
  47. Discrediting the 'grey good' myth by strider_starslayer · · Score: 2, Insightful

    I don't understand how so many slashdotters can be convinced that we will experence global armegeddon at the hands of nanomachines that will reduce us to 'grey goo'.

    I hope what I type here might help dispel some of this parasitic meeme!

    In the event that we mannage to make 'room temprature' nanmachines that are not instantly destroyed by a slight breeze, can break down even terminally simple matter for use in replication, and somehow get released into the world with a malicious intent (or through a glitch)- they will not be too much of a threat!

    Ultimately unless some methoed of making semi-conductors and computer circurtry that dose not involve electricity at all comes along, each and every single active nanomachine will be vunerable to a simple EMP, and EMPs can be easily generated by sending massive voltage through a coil- hence even a 'barnyard warrior' fighting a nanomachine threat could rig up his disel truck to take out the microscopic buggers (that might make a good movie though!). In the event that we do find a way to making non-electric computer circutry it would have to be immue to dosens of other things that can mess with computer circuts (for instance a theoretically 100% optical computer could be fried by massive ammounts of UV radiation)

    And lets not forget the technical overhead required to overcome those first few problems! Any nanomachine made of metal will be victim to rust, small bits of object rust much faster then large ones- hence a swarm of iron nanomachines could be killed with a simple spray of salt-water! Diamond ones would be extremely brittel (diamond is strong, but shatteres rather then bending) so sound waves would be an effective weapon (True for any crystaline structure; and a crystaline structure is required for optical transmission!)

    Next is the ability to reprduce using simple matter, I mean, a lab is a very different enviornment then the real world, we'll probablly see self-replicating nano-machines that work in specifically temperature controled vats long before we see ones that can do it in the real world: Why, even if you can get a machine so sofisticated that it can tear apart simple carbon atoms, and whatever else it needs (and figure out what's carbon and what's not) and build a copy of itself, it's likely to loose it's tiny manipulators with every major temprature change, as the particles grow and contract while it tries to move them along!

    Next someone will have to be able to get a hold of these things, and reprogram them to do somethign bad (that may actually be the easiest part: as all you have to do is REMOVE code that will be telling them to do other things besides replicate), but it will still require a multi-billion dollar lab to access there tiny circutry and reprogram them on such a basic level (the equivalent to taking out chips in a modern computer, but requireing a nano-manipulator!), so this is not something a 'backyard terrorist' is going to do, and if a government dose it, they will put a reasonable 'off' time in them, which will probabally put them into the same catagory as other WMDs.

    --
    -Millions of Monkeys, Millions of typewriters, 6 hours of sorting through faeces encrusted pages to find: This post
    1. Re:Discrediting the 'grey good' myth by Magada · · Score: 0

      you assume nano will be organized just the same as the computers you're used to. BOFN: nano don't need silicon. Something like babbage's machines would work just as well on the nanoscale, except you could stuff lots of 'em on a pinhead, make them compute/execute their own evolution. And no 'lectricity needed either. Van der Waals force, tunneling other various quantum effects could do all the "now push electron" work if you don't like mechanical calculators. Speaking of quantum effects...ever thought of that as a source of computing power for nano? Mataglap will happen.

      --
      Something bad is coming when people are suddenly anxious to tell the truth.
  48. Something Being Ignored by Piethon · · Score: 1

    Something that I think is seriously being ignored is the fact that if people do build these so called 'nano-viruses' then we will build nano antibodies. The human race would never let such a severe danger go unchecked, even with computer viruses there is antivirus software. (Or just Linux)

    1. Re:Something Being Ignored by Artifakt · · Score: 1

      I'm starting the Open source Nano-society, the Free Nanoware Foundation, and writing the first draft of the GNNPL(Gnn's not Nano Public Liscence), even as we speak. Please donate.

      --
      Who is John Cabal?
    2. Re:Something Being Ignored by quetzalc0atl · · Score: 1

      the problem is a small detail involving the laws of thermodynamics (entrophy): it will always be easier to destroy than to create.

      how much does it cost a terrorist to blow something up? how much does it cost us to prevent it?

      likewise it only requires limited understanding to create something destructive, but to undo destructiveness will always be much harder. it is relatively easy for enterprising terrorists to make bioweapons with the current technology available; yet we still cannot cure even the simplest of diseases that afflict us, with the current technology available.

  49. Ice 9 by some+old+guy · · Score: 1

    Kurt Vonnegut, in his infinite prescience, tried to warn us about reproductive molecular tinkering in Cat's Cradle. Oh, ye suckers...

    --
    Scruting the inscrutable for over 50 years.
  50. What's it good for? Everything. by kramer2718 · · Score: 2, Informative

    Amazingly precise surgery. Imagine tiny robots that could destro cancer cells, but leave healthy cells alone. Imagine if solid sheets of clear diamond were cheaper than glass.

    Imagine if the only real cost to build a product (such as a rocket engine or a child's toy) were only the design (and then self-replicating nano-bots would take-over given a supply of common elements).

    Yes, yes. This seems to be a long way off, but the scientific principles are sound even if we don't have the engineering know how yet. Furthermore, the risks are significant, so it's about time that we start planning for how to do these things safely and securely.

    Read the book The Diamond Age Or a Young Lady's Illustrated Primer by Neal Stephenson. Besides being a fantastic (if strange) read, it gives an idea of the possibilities and (to some extent) the dangers of nanotech.

    Also, check out Engines of Creation The Coming Era of Nanotechnology by Eric Drexler. It also explores the possibilities of nanotech, but presents a compelling case that we should be planning for this technology to make sure that it is safe secure and truly beneficial.

  51. more immediate worries by ajagci · · Score: 3, Interesting

    There is already "nanotechnology" (and "picotechnology") that resists disassembly: compounds that take a long time to break down in the environment, compounds that cause harm to the environment when they break down, etc. You know, things like DDT, plastics, etc. If we can't even manage to get reliable biodegradability into shopping bags or computers, how does anybody expect to get it into nanotechnology?

    Fortunately, this particular worry is a marketing gimmick: we are about as likely to be overwhelmed by non-degradable nanomachines as we are to fall into a black hole. We don't need a "center for responsible nanotechnology" because there isn't any nanotechnology and there likely won't be, ever. Unless, of course, you are referring to paint manufacturers and biotechnology companies.

  52. The perception of risk - So do it in Space by Guy_Warwick · · Score: 1

    The readers of Slashdot seem to be constantly amazed by the fears of others.

    It might be an idea to check out the work of Paul Slovic
    http://oregonstate.edu/dept/IIFET/2000/papers/slov ic.pdf

    He is a psychologist who specializes in the perception of risk, unlike the touchy feely, "so it's your mum's fault" kind of psychologist he attempts a pretty objective psychometric methodology even if he does tend to throw in the odd bit of social constructivism.

    There are many reasons why people view a risk as being unacceptable but always among them are Visibility Immediacy and Distance.

    So a smokey chimney stack far away is much better than a nuclear power station down the road. You can see smoke, cough straight away when you inhale it and some red neck yokels in mines and power stations get to die not you. On the other hand those nasty nano/nuclear thingammies creep up on you invisibly, kill you slowly and nuclear = mega so it works from a long long way.

    Evidence as it applies to alternative technology hardly cracks a mention among factors that make something risky.

    Readers should understand that approximately 20% of the Western world is functionally illiterate that means "Danger 2000 volts" is a problem, ask them what a standard deviation is and 95% would think it's something that happens in a gay bar. A rational assessment of risk is simply beyond them.

    My view is if you explain Nanotechnology to people you will simply make them more frightened.

    Is there an answer - I don't think on this Earth - It's another reason for a Moon/Mars Colony

  53. UK nuclear is the most Expensive - because of dody by Guy_Warwick · · Score: 1

    Add subsisdized public infrastructure (Rail, Road and Ports for megatonnes of coal)
    Perhaps Military intervention in the Middle East for Oil and Gas.
    Forget Externals like Acid Rain, sulphur Nox and CO2

    Then Coal power looks sooo sexy.

    If you want cheap power then build a coal power station with a straight through stack. Buy the coal from a third world country I mean hello there are millions of yellow, brown and black miners a few less no one will miss them. Strip mine it and don't back fill, when those pesky little third worlders get a bit richer they can water ski in them.

    Try some real cost comparisons that include externals. Entertain some charitable thoughts about those in the thirld world who might just want a light bulb. Worry a bit about carbon output and then Nuclear does not look so bad. Of course as it's not in your back yard !

  54. Technology "With" Sanity... by Genda · · Score: 4, Insightful
    If we look at the recent history of our species... let's say the last 500 years, it's clear that we have often thought about "How to do?" before thinking about either "What have we done?" or "How do we undo this?". Western history is rife with accidents, oversights, impatient follies, cost effective disasters, poorly implemented catastrophies, mistaken circumstances, and plain and simple, greedy shortcuts.

    In most cases, a little simple planning might have prevented these wrecks, in others, a thoughtful application of technology might have prevented the possibility of disaster. We're at the threshold of being able to do amazing things with matter and energy, and we've already been seriously burned by technodisasters from Chernobyl to Bhopal. The real possibility of global disaster, demands that the intelligence be put in the technology from the beginning. The technology must be;
    • able to be turned OFF.
    • clean up toxic byproducts.
    • bio-friendly (i.e. not leave residues that endanger ecological systems.)
    • able to be isolated, localized, and deactivated with ease and velocity.
    • a short lived in the wild, limited to the number of generations it can reproduce.


    We've already constructed technologies that have left behind environmental disasters. It's not like we don't already know how that process works. The threat is to do precisely the same thing with a technology that is perfectly capable of sterilizing a city, state, or nation. We can no longer afford the trade of expediency over sanity. The cost just got too high.

    Genda Bendte

    --"Don't come running to me when the gray goo eat's yer feet off!!!"
    1. Re:Technology "With" Sanity... by Anonymous Coward · · Score: 0

      I am intrigued by this nanotech stuff.

      As I understand it the technology for nano replicators is almost in place, trouble is that noone has the foggiest where to begin designing such a machine.

      The idea of saying right we'll put in an 'achilles heel' seems hopelessly foolish.

      If you have any system the copies its self from perhaps some kind of blueprint (lets call this bleuprint DNA), then there is probably going to be a chance of some mistake at the replication of that blueprint... ... What I'm saying is that if you have copying and mutation and selection (in the form of someone saying "right switch off all the machines in vat 1") this is real evolution territory.

      And as anyone who saw Jurrasic Park will know...

      "Life finds a way!"

      Yes I'm being melodramatic, but whenever I ask nano scientist about this they sidestep with ideas about putting more than one mechanism in. This is analagous to saying: "when Penicillin stops working cos we misused it, we'll find another anti-biotic..." seems a bit short sighted doesn't it?

    2. Re:Technology "With" Sanity... by Lord+Omlette · · Score: 1
      able to be turned OFF.
      Only if the customer wants to pay for it.
      clean up toxic byproducts.
      Too expensive.
      bio-friendly (i.e. not leave residues that endanger ecological systems.)
      Too expensive, but we'll be sure to run commercials about how we're working hard to clean up the environment.
      able to be isolated, localized, and deactivated with ease and velocity.
      Only if the customer wants to pay for it.
      a short lived in the wild, limited to the number of generations it can reproduce.
      Don't worry, free-market capitalism will solve everything. All you have to do is get the government to stop taxing and stop regulating.
      --
      [o]_O
  55. You Arrogant Humans - Kill Mode Activated! by pipingguy · · Score: 1


    Please don't disassemble me!

  56. Generalise it to Reversability by CrosbieFitch · · Score: 4, Interesting

    Needs to apply to genetic engineering too.

    Any autonomous/self-replicating device, organism or other material that is to be released into the environment, must be reversible, i.e. it must be at least possible to disable it within a reasonable period, and ideally possible to remove all significant traces of it from the environment.

    It is not enough to simply say "Well, we've done tests and it doesn't seem to harm anything as far as we can tell so far".

    If anything people need to learn how many times such statements have proved to be false from the software industry, e.g. "Well, we've done tests and the software seems to work fine - no bugs left as far as we can tell" - yeah... unleash it baby!

    This law should also apply to the Internet, i.e. release of autonomous/self-replicating software.

    Every potential poison we create must have an antidote.

    If anything we need to develop skills/technology at disabling these things just as much as the skills to create them in the first place.

    No doubt there will be those quite happy to unleash grey-goo...

  57. It depends upon the definition of "is". by Anonymous Coward · · Score: 0
    Remember that Congress decided that nuclear material should only be used once. So what in the U.S. is called "high level radioactive waste" is called "nuclear fuel" in other countries. So the U.S. has more "waste" to deal with.

    Physics by legislation.

  58. More human than human by Anonymous Coward · · Score: 0

    One of the things that always strikes me about the concept of nanotechnology is that it works at similar scales as current biology. So I have to wonder why, at some point, nanotech and biochemistry won't converge at some point.

    Given that, there is a simple solution that the biological world has already given us: mortality. Design the nanites to have a reproduction counter, similar to the telomeres in our own cells, that limit the number of generations from the source cell/nanite. Or, in corporate terms, planned obsolescence.

    "So the Tyrell Corporation buult in a fail-safe device."

    "What's that?"

    "A four year life span."

  59. Solution: by stfvon007 · · Score: 1

    the waste will still be there when your grandchildren walk this earth

    Take a look at the sun, and you'll see a huge clean efficient way of getting about 90-99% of the chemical energy stored in molecules


    I think the solution here is obvious. We're on earth, there's waste on the earth, and we have a nice clean sun where noone is living. Lets put all our garbage there!

    --
    All misspellings and grammatical errors in the above post are intentional and part of my artistic expression.
    1. Re:Solution: by quetzalc0atl · · Score: 1

      how many times must we hear this.... a quick primer on physics of solar system travel: the hardest object to reach in our solar system is THE SUN. since the earth is rotating around the Sun at about 30 km/s you would have to fire rockets in the opposite direction to kill that velocity in order to reach the Sun: otherwise you wind up in a stable (albeit closer) orbit around the Sun. There's one catch: our rocket technology today can barely achieve the 12 km/s velocity needed to escape Earth's atmospher. So when you come up with a solution, gimme a call and then we can all start "firing our garbage into the Sun" - right, lets spend a billion dollars to eliminate $5 of garbage, sounds like environmentalist reasoning to me.

    2. Re:Solution: by haruchai · · Score: 1

      Have you seen the price tag for the Yucca Mountain project? What sort of reasoning is that?

      --
      Pain is merely failure leaving the body
    3. Re:Solution: by UnknownSoldier · · Score: 1

      No need to be snooty about it.

      I found your post to be informative, none-the-less. (i.e. I didn't know the 30 km/s & 12 km/s stats.)

      Thank-you for posting.

    4. Re:Solution: by some+guy+I+know · · Score: 1
      So when you come up with a solution, gimme a call and then we can all start "firing our garbage into the Sun"
      Nulcear propulsion.

      Oh, wait...
      --
      Those who sacrifice security to condemn liberty deserve to repeat history or something. - Benjamin Santayana
  60. Re:Clarify? by Anonymous Coward · · Score: 0

    And as a resident of Las Vegas, may I personally say, fuck you.

    How about "As a resident of LV that currently has a job ..."

  61. The damn dams are ok with me... by NotQuiteReal · · Score: 1

    ... too bad there is no water where I live :-)

    --
    This issue is a bit more complicated than you think.
  62. New Jersey by rubicon7 · · Score: 1

    (OT, but my hackles are up)
    (non-USians, please disregard)

    You know, I'm a little sick of people dumping (no pun intended) on New Jersey like this. Sure, we've got our industrial areas, but most of the state (away from the Turnpike) is actually quite nice.

    Look at the industrialized areas of your own state before mocking ours.

    --
    --- We are not in the 8th dimension. We are over New Jersey.
  63. Re:What's it good for? Everything. by steveha · · Score: 1

    You don't need to buy Engines of Creation in dead-trees format; you can read it from the web.

    http://www.foresight.org/EOC/

    Lots of free resources available at foresight.org:

    http://www.foresight.org/NanoRev/index.html

    By the way, the reason Engines of Creation rocks so hard is because it's all about existance proofs. K. Eric Drexler claims that we will be able to build little machines to do this or that, and then he shows how there are already bacteria, or viruses or something in nature that does something similar.

    For example, he describes a nanocomputer with moving parts. There's no reason to think that nanocomputers will always use moving parts, but there aren't any electronic or quantum computing devices in nature, while there are lots of microscopic things with moving parts.

    steveha

    --
    lf(1): it's like ls(1) but sorts filenames by extension, tersely
  64. You can't fight *everything* with fire by Randym · · Score: 1
    What doesn't burn (or melt, or vaporize, disassemble) when the temperature is high enough ?

    Carbon dioxide. How do you oxidate something that's *already* the product of oxidation?

    To answer your forthcoming objection -- CO2 is obviously not a very complex compound, and presumably you *meant* "a sufficiently complex compound created by nanotechnology" when you referenced 'what'. But it *is* one of a class of compounds (like, say, the chlorides -- I'm thinking of dioxin) that has such a high binding energy that, while it might be *possible* to incinerate it at a high enough temperature to disassemble, the amount of fuel required just to disassemble *one* of them makes this technique infeasible. Especially if there are trillions -- or more -- of them. And -- another problem -- how are you going to *find* them all, if you need to destroy them in the first place? We can't yet even deal with bacteria, which are, by nanotechnologial standards, gigantic. (And along these lines look at anthrax: *really* hard to disassemble *already*.)

    The bottom line here is this: we may discover that, analogically, creating nanotech is like a one-way trap door: easy to go one way (creation), hard to go the other (disassembly). We may eventually have to reboot the planet to deal with the hard cases. Yep: GGSOD.

    --
    DNA is a Turing machine. You, however, being dynamic and emergent, are not.