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One Variety of Sea Slugs Cuts Out the Energy Middleman

dragonturtle69 writes with this story, short on details but interesting: "These sea slugs, Elysia chlorotica, have evolved the ability to gain energy via photosynthesis. Forget about genetic modifications for sports enhancements. I want to be able to never need to eat again — or do I?"

232 comments

  1. Mail Order Monsters by bigattichouse · · Score: 2, Insightful

    That was my totally favorite upgrade in Mail Order Monsters - recharge from the sub!

    --
    meh
    1. Re:Mail Order Monsters by bigattichouse · · Score: 1

      Sun.. not sub.

      --
      meh
    2. Re:Mail Order Monsters by PrescriptionWarning · · Score: 3, Funny

      I dunno, sub could still work... I mean it worked for Jared eatin all those sammiches!

    3. Re:Mail Order Monsters by SydShamino · · Score: 1

      Mod up for kickass game reference. One of my favorites on the Commodore 64.

      --
      It doesn't hurt to be nice.
    4. Re:Mail Order Monsters by Mister+Whirly · · Score: 1

      Loved that game!

      --
      "But this one goes to 11!"
    5. Re:Mail Order Monsters by obeythefist · · Score: 2, Funny

      Stay out of the sun or you'll get fat!

      --
      I am government man, come from the government. The government has sent me. -- G.I.R.
    6. Re:Mail Order Monsters by Ihlosi · · Score: 1

      Mod up for kickass game reference. One of my favorites on the Commodore 64.

      Seconded. It was Pokemon ... decades before Pokemon. And it was probably as good as games got on the old breadbox.

  2. eating by mcgrew · · Score: 4, Insightful

    I want to be able to never need to eat again -- or do I?

    I'l like the ability to never HAVE to eat again, but I wouldn't want to lose the ability to eat at all. Eating is enjoyable. One would hope that you could control the photosynthesis to keep from getting too fat, though.

    1. Re:eating by Anonymous Coward · · Score: 0, Troll

      Eating is enjoyable.

      For some people. Others like me love the idea of never having to eat again. For me eating is a chore I have to do so that I can live. It sucks up time and sometimes makes me ill if my body doesn't like what I ate.

    2. Re:eating by Anonymous Coward · · Score: 0

      quit eating out of the dog food bowl.

    3. Re:eating by Attila+Dimedici · · Score: 4, Funny

      Yeah, but how would this help? Instead of eating you would have to go out into the sun (you know, that big, bright, yellowish thing on the eastern horizon when you go to bed).

      --
      The truth is that all men having power ought to be mistrusted. James Madison
    4. Re:eating by ground.zero.612 · · Score: 0, Redundant

      Yeah, but how would this help? Instead of eating you would have to go out into the sun (you know, that big, bright, yellowish thing on the eastern horizon when you go to bed).

      Which corner of the Earth does this occur on? Where I live the sun sets on the western horizon. Just sayin'.

      --
      "Be prepared, son. That's my motto. Be prepared." --Joe Hallenbeck
    5. Re:eating by Anonymous Coward · · Score: 1, Funny

      Whoosh!

    6. Re:eating by characterZer0 · · Score: 4, Informative

      whoosh.

      The sun rises on the eastern horizon just as you are going to bed after sitting at your computer all night.

      --
      Go green: turn off your refrigerator.
    7. Re:eating by Anonymous Coward · · Score: 1, Informative

      They didn't say the sun was setting, just where it was located when one was going to bed, hence implying that the target of the comment is thought to stay awake until sunrise.

    8. Re:eating by Anonymous Coward · · Score: 1, Informative

      Yup, and it rises in the east... at the wee hours of the morning when most of us geeky types are finally heading to bed. :P

    9. Re:eating by confused+one · · Score: 4, Insightful

      Slugs aren't very energetic. It's doubtful that photosynthesis alone will provide the energy necessary to power your body and that meat based computer in your head. You would still need to ingest a fair amount of food, in order to extract the concentrated energy contained in it.

    10. Re:eating by Anonymous Coward · · Score: 0

      Wow an echo. "Hello is there anyone in there?"

    11. Re:eating by clone53421 · · Score: 4, Insightful

      New rule: You’re only allowed to intentionally miss the point of a joke if the joke you’re making is funnier than the one you’re ignoring.

      --
      Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
    12. Re:eating by Anonymous Coward · · Score: 1, Funny

      Just nod if you can hear me...

    13. Re:eating by Anonymous Coward · · Score: 0

      Wow an echo. "Hello is there anyone in there?"

      Whoosh. No! Whoosh.

    14. Re:eating by Intron · · Score: 2, Funny

      Slugs aren't very energetic. It's doubtful that photosynthesis alone will provide the energy necessary to power your body and that meat based computer in your head.

      So this would work for my boss, then.

      --
      Intron: the portion of DNA which expresses nothing useful.
    15. Re:eating by Broken+scope · · Score: 1

      I seriously doubt that we have enough surface area to replace eating with photosynthesis. We would also continue to need nutritional input.

      --
      You mad
    16. Re:eating by sarahbau · · Score: 5, Informative

      I just did a few quick calculations. Assuming humans have 2 square meters of skin, and stood naked in direct sunlight in the best conditions for 8 hours per day, and assuming 5% efficiency for photosynthesis, we would only get enough energy to provide for 11 hours of sleep (250 BTU/hr), 7 hours of sitting still (400 BTU), 4 hours of light work (650 BTU) or 1 hour of heavy work (2400 BTU). We'd still probably need to consume 2/3 or so of our normal caloric intake from food.

      Sources:
      http://www.solarexpert.com/Heat-theory.html
      http://hypertextbook.com/facts/2001/IgorFridman.shtml
      http://www.answerbag.com/q_view/514275
      http://www.ccmr.cornell.edu/education/ask/index.html?quid=1021

    17. Re:eating by kalirion · · Score: 2, Interesting

      For me, some foods are enjoyable, most are a chore.

      I'd like to be able to eat some candy bars or ice cream or an occasional steak or whatever for pleasure, maybe pop a vitamin supplement, and not worry about having to eat to survive.

    18. Re:eating by ground.zero.612 · · Score: 0, Redundant

      It's not really a joke when it's not funny.

      --
      "Be prepared, son. That's my motto. Be prepared." --Joe Hallenbeck
    19. Re:eating by Anonymous Coward · · Score: 1, Interesting

      I don't know about you, but if you present 2 m^2 of *cross-sectional area* to the sun, then you're either really tall or awfully fat. If 2 m tall, then you'd have to have an average width (from head to toe) of 1m.

    20. Re:eating by clone53421 · · Score: 0, Redundant

      You didn’t think this was funny?

      Yeah, but how would this help? Instead of eating you would have to go out into the sun (you know, that big, bright, yellowish thing on the eastern horizon when you go to bed).

      Maybe there’s something wrong with your sense of humour.

      Or with mine, more likely.

      --
      Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
    21. Re:eating by IndustrialComplex · · Score: 1

      One would hope that you could control the photosynthesis to keep from getting too fat, though.

      Sunscreen.
      SPF: Diet

      --
      Out of modpoints but really liked a post? 1BDkF6TtmmeZ3yqXbz9yhdYVqRYnwFoXDj
    22. Re:eating by osu-neko · · Score: 1

      Whoosh.

      Nice save. /sarcasm

      --
      "Convictions are more dangerous enemies of truth than lies."
    23. Re:eating by osu-neko · · Score: 1

      It's not really a joke when it's not funny.

      That counts as a "whoosh", then. You didn't get the humor.

      --
      "Convictions are more dangerous enemies of truth than lies."
    24. Re:eating by sarahbau · · Score: 2, Informative

      Yeah. I know it's not perfect, and that all 2 m^2 of skin wouldn't actually be receiving full sunlight. I was just trying to emphasize that even with unrealistically optimal conditions, we wouldn't get nearly enough energy from the sun to live on photosynthesis alone.

    25. Re:eating by Kompressor · · Score: 4, Funny

      Perhaps the GP planned to unzip his skin down the back, peel it forward, and present his entire "surface area" to the sun?

      ** shudder **

      --
      kmem russian roulette: Aquillar> dd if=/dev/urandom of=/dev/kmem bs=1 count=1 seek=$RANDOM
    26. Re:eating by mea37 · · Score: 4, Insightful

      The point I think you (and GP, and the submitter, and many others) are missing is, photosynthesis does not remove the need to eat. Energy isn't the only thing you get from food. If you had vitamin pills so effective that you could live on them, plus sugar, plus water - and nothing else - then you could replace the sugar with the ability to perform photosynthesis. Such pills do not exist.

      In case you're wondering, plants do indeed "eat". That's why they need roots in fertile soil.

    27. Re:eating by Anonymous Coward · · Score: 0

      ...or maybe use mirrors.

    28. Re:eating by Z00L00K · · Score: 1

      You will probably need to eat something to gain minerals, but eating for energy can be restricted.

      --
      If builders built buildings the way programmers wrote programs, then the first woodpecker would destroy civilization.
    29. Re:eating by mlheur · · Score: 1

      Perhaps the GP planned to unzip his skin down the back, peel it forward, and present his entire "surface area" to the sun?

      I got the point a few posts back, but this comment actually made me laugh. Thank you.

    30. Re:eating by rickb928 · · Score: 1

      That covers my needs. I'm in!

      --
      deleting the extra space after periods so i can stay relevant, yeah.
    31. Re:eating by blincoln · · Score: 1

      I seriously doubt that we have enough surface area to replace eating with photosynthesis.

      That can be remedied. Who doesn't want enormous green wings sprouting out of their back?

      --
      "...always new atoms but always doing the same dance, remembering what the dance was yesterday." -Richard Feynman
    32. Re:eating by by+(1706743) · · Score: 1

      Of course, your calculations of energy consumption are for a normal human. The gastrointestinal system not only produces energy, but consumes it as well. For a photosynthetic human, a smaller gastrointestinal system could result in less power consumption. Likewise, transporting energy could become more efficient, in that it could be less centralized; tasks such as hair growth could use the energy from the surrounding photosynthetic skin, rather than the food energy (of course, the actual material must be pulled from the food). That said, I know zilch about biology, as I'm sure my post made evident.

    33. Re:eating by c6gunner · · Score: 1

      Guess you never heard of UV lamps ...

    34. Re:eating by mcgrew · · Score: 1

      Sure it is. It;s just not a good joke. And what I may consider hilarious, you may think rude. And vice versa.

    35. Re:eating by icantbemiyu · · Score: 1

      How come we only get 5% conversion efficiency? I think we should be able to swing something higher than that. 10% should cut it down to like..what? 1/3 Calorie consumtion? Your standard P-cell gets %20. In any case....eating is what needs to go. It's sleep. I want to evolve to be the creature that does not need sleep.

    36. Re:eating by JeanPaulBob · · Score: 1

      Wait... You're saying there's a reason plants don't move?

    37. Re:eating by DeePCedure · · Score: 2, Funny

      Just nod if you can hear me...

      Is there anyone at home?

    38. Re:eating by vlm · · Score: 1

      One would hope that you could control the photosynthesis to keep from getting too fat, though.

      Wear variable amount of clothes.

      Strange side effect -> women in tiny bikinis would be fat, women in the cover it all up wetsuit like one pieces would be skinny.

      --
      "Science flies us to the moon. Religion flies us into buildings." - Victor Stenger
    39. Re:eating by TheDownSyndromeKid · · Score: 1

      If the joke wasn't that we stay up through all hours of the night, what was the joke? That he spends so little time in it, he has no idea of the behaviors of the sun? If that was the original joke, I'd say the other guy did, in fact, replace it with a better one.

      --
      If you blow Satan, you will get satanic semen in your face.
    40. Re:eating by mu22le · · Score: 1

      Yeah. I know it's not perfect, and that all 2 m^2 of skin wouldn't actually be receiving full sunlight. I was just trying to emphasize that even with unrealistically optimal conditions, we wouldn't get nearly enough energy from the sun to live on photosynthesis alone.

      we just need to evolve (or bioengineer) larger backs to catch more sun. Note that the creature doing photosynthesis has quite a large back

    41. Re:eating by jschen · · Score: 2, Informative

      and assuming 5% efficiency for photosynthesis

      Interestingly, this estimate is right around the theoretical maximal efficiency of photosynthesis. As outlined in Current Opinion in Biotechnology 2008, vol. 19, pp. 153-159 (sorry, subscription only), the maximum theoretical efficiency of C3 photosynthesis is a mere 4.6%. C4 photosynthesis has a bit higher potential at 6.0%.

      We can't even reach these efficiencies in plants (best for crops in a growing season is 2.4% for C3 or 3.7% for C4; see above reference), so sarahbau is right in saying that the amount of energy we could hope to get from this is quite low.

    42. Re:eating by mcgrew · · Score: 1

      I always wondered why they call thin women "hot", when it's the fat ladies who are always sweating and turning down the thermostats?

    43. Re:eating by jschen · · Score: 1

      Because biology is not very energy efficient. This 5% efficiency is actually quite close to the theoretical maximum efficiency. Breaking down the numbers from the paper I cited in response to the GP's post, about 1/2 the sun's energy is outside of the photosynthetically active spectrum. About 1/4 of that energy is lost due to inefficiencies of the photosynthetic machinery in gathering light energy. (At about 75% efficiency, this is by far the most efficient part of the process.) For C3 photosynthesis, about 2/3 of the energy that is captured is wasted in the inefficiency of carbohydrate synthesis in photosynthesis. About 2/3 of the energy produced goes into simply maintaining the photosynthesis machinery. Those losses add up in a hurry. The breakdown is a bit different for C4 photosynthesis, but the end result is in the same ballpark.

    44. Re:eating by clone53421 · · Score: 2, Informative

      If the joke wasn't that we stay up through all hours of the night

      It was.

      “that big, bright, yellowish thing on the eastern horizon when you go to bed” – funny.
      “Where I live the sun sets on the western horizon” – not so funny.

      --
      Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
    45. Re:eating by Eponymous+Bastard · · Score: 1

      obXKCD... err... obSchlockMercenary

    46. Re:eating by jgrahn · · Score: 3, Funny

      Perhaps the GP planned to unzip his skin down the back, peel it forward, and present his entire "surface area" to the sun? ** shudder **

      There are lots of options; the human body is flexible. Remember that Goatse guy? I bet there are other areas of the human body which can be slowly trained and stretched over time, until finally you are able to zip down your pants and fold out your bright green, photosyntesizing scrotum.

      (Oh, how I miss alt.tasteless from the early 1990s ...)

    47. Re:eating by Nadaka · · Score: 1

      come on now, you know thats not how you do back of the napkin math. First, you need to assume a perfectly spherical human...

    48. Re:eating by hierophanta · · Score: 1

      i thought the joke was that he's a vampire. you know, with the whole not eating thing, and avoiding the sun...

    49. Re:eating by Khashishi · · Score: 1

      We just need some way to induce Sun to go into red giant stage.

    50. Re:eating by AmberBlackCat · · Score: 1

      That's the same as saying "no jokes on Slashdot".

    51. Re:eating by zmollusc · · Score: 1

      I and many others are pretty much spherical. Looking at the 5% maximum efficiency it would seem that I could cease eating easily as I move much less than those energetic sea slugs, the only difficulty is the need for sunlight. Could fibre optics pipe the sunlight to my sofa?

      --
      They whose government reduces their essential liberties for temporary security, receive neither liberty nor security.
    52. Re:eating by Nadaka · · Score: 1

      Yes, as long as you get the long and flexible ones so they can reach the sofa in your basement.

    53. Re:eating by Opportunist · · Score: 1

      It would sure give the growing up basement dweller an excuse "No MOOOOOOM, going out does not make me burn fat, it makes me put it ON, don't you remember, photosynthesis?"

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    54. Re:eating by stuckinphp · · Score: 1

      I really don't think living in a closet is going to be a viable alternative to going outside every once in a while.

      --
      if only
    55. Re:eating by Opportunist · · Score: 1

      If he did like my boss (i.e. outsource his memory into cellphone and outlook, and processing into us), then probably yes.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    56. Re:eating by Opportunist · · Score: 1

      Ah, so from now on I can say I'm not lazy when I spend a day veggin' on the couch, I'm just preparing for the evolutionary step ahead!

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    57. Re:eating by Anonymous Coward · · Score: 0

      Wait a sec, is this with pants on?

    58. Re:eating by Opportunist · · Score: 1

      First, you need to assume a perfectly spherical human...

      Judging from a few pics I've seen of the US population lately, they're working on that.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    59. Re:eating by Opportunist · · Score: 1

      And think of what this would do for the economy! You need new cars, new beds, new clothing, and I'm sure enterprising individuals would find whole new places to punch holes into their bodies to dangle crap from.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    60. Re:eating by Hecatonchires · · Score: 1

      I've been working on that by upping my intake of sugary drinks. The shame is, I seem to be increasing belly size at the slightly slower rate to back size. Sunbathing naked is fun tho.

      --

      Yay me!

    61. Re:eating by Hecatonchires · · Score: 1

      I'm sure you can buy a scrotum stretching rig at your better local sex shop.

      --

      Yay me!

    62. Re:eating by Hecatonchires · · Score: 1

      Thats why triffids started eating people

      --

      Yay me!

    63. Re:eating by Tetsujin · · Score: 1

      If the joke wasn't that we stay up through all hours of the night

      It was.

      “that big, bright, yellowish thing on the eastern horizon when you go to bed” – funny.
      “Where I live the sun sets on the western horizon” – not so funny.

      Oh, I know an Andre the Giant quote that would work great right here... No... no, not going to do it.

      Let's just say that I think your idea of what's "funny" is a little bit strange, too permissive perhaps.

      --
      Bow-ties are cool.
    64. Re:eating by Tetsujin · · Score: 1

      It's not really a joke when it's not funny.

      That counts as a "whoosh", then. You didn't get the humor.

      It's not a "whoosh" if the joke just wasn't funny...

      --
      Bow-ties are cool.
    65. Re:eating by Tetsujin · · Score: 1

      Yeah. I know it's not perfect, and that all 2 m^2 of skin wouldn't actually be receiving full sunlight. I was just trying to emphasize that even with unrealistically optimal conditions, we wouldn't get nearly enough energy from the sun to live on photosynthesis alone.

      we just need to evolve (or bioengineer) larger backs to catch more sun. Note that the creature doing photosynthesis has quite a large back

      Hm, maybe we can acquire some genes from your mom...

      --
      Bow-ties are cool.
    66. Re:eating by Tetsujin · · Score: 1

      Perhaps the GP planned to unzip his skin down the back, peel it forward, and present his entire "surface area" to the sun?

      ** shudder **

      That approach works great - just don't use it when sunbathing at the beach! It's a pain in the ass trying to get all that sand out.

      --
      Bow-ties are cool.
    67. Re:eating by cowboy76Spain · · Score: 1
      They absorb nutrients through the roots, but only in very limited amounts. What they need more is water for the photsynthesis.

      We eat to get both energy and raw materials to create our tissues. From photosynthesis, plants do not only get energy but most of the "structural" carbon and oxygen. From the root they only get the rest of elements that, while great in number (N, K, etc.) and vital, in wheight are a minimal part of the plant.

      --
      Why can't /. have a rich-text editor? Editing your own HTML is so XXth century.
    68. Re:eating by Anonymous Coward · · Score: 0

      Then stop eating tastless factory-made foods and learn to cook with real ingredients.

    69. Re:eating by zmollusc · · Score: 2, Funny

      I use the term 'Underground Lair of Ubertude'. It has an astoundingly effective 'no girls allowed' sticker on the door.

      --
      They whose government reduces their essential liberties for temporary security, receive neither liberty nor security.
    70. Re:eating by easyTree · · Score: 1

      I'd like to be able to eat some candy bars or ice cream or an occasional steak or whatever for pleasure, maybe pop a vitamin supplement, and not worry about having to eat to survive.

      I'd like to buy packs of dehydrated water thus removing the need to carry heavy water around when I'm out and about...

    71. Re:eating by TheDownSyndromeKid · · Score: 1

      It was.

      whoosh.

      The sun rises on the eastern horizon just as you are going to bed after sitting at your computer all night.

      Whoosh.

      Then what was the 2nd whoosh for? Me, oh my, I'm so confused.

      --
      If you blow Satan, you will get satanic semen in your face.
    72. Re:eating by Narnie · · Score: 1

      I guess that explains what all those guys are doing when they spend the whole day hanging out in front of 7-eleven. And I thought that they were illegals loitering around for manual labor type work. Shame on me.

      --
      greed@All_Evils:~#
    73. Re:eating by ZosX · · Score: 1

      the real joke is that you have to debate on whether the joke was funny or not.

    74. Re:eating by cortesoft · · Score: 1

      I would answer this, but I don't want to get a third whoosh in this thread

    75. Re:eating by alt154 · · Score: 1

      so you harvest 1/3 of your caloric intake from light at the expense of having a green skin color. bad investment.

    76. Re:eating by Anonymous Coward · · Score: 0

      Right, but it may keep me from starving to death. Sure I'll be braindead... but I don't see how that's any difference from my current condition.

    77. Re:eating by c6gunner · · Score: 1

      Shows how much you know. Hundreds of slashdot users have been living that lifestyle for at least a decade.

    78. Re:eating by bronney · · Score: 1

      duh.. ever heard of ice?.. wait..

    79. Re:eating by Anonymous Coward · · Score: 0

      When this works for real, population shoots to 200 billion and we are killing each other for a spot in the sun. Live long and prosper. Sometimes I despair of humanity.

    80. Re:eating by Fred_A · · Score: 1

      I really don't think living in a closet is going to be a viable alternative to going outside every once in a while.

      I've got screen captures of that "outside" you speak of. Looks over rated to me.

      --

      May contain traces of nut.
      Made from the freshest electrons.
    81. Re:eating by Anonymous Coward · · Score: 0

      Cook!?! Then it really _would_ be a chore.

    82. Re:eating by Anonymous Coward · · Score: 0

      All you really need is a chin-up bar and a couple of c-clamps.

      Hmm... Does self sterilization qualify you for a Darwin Award?

    83. Re:eating by clone53421 · · Score: 1

      Apparently “Which corner of the Earth does this occur on? Where I live the sun sets on the western horizon. Just sayin'.” was supposed to be funny.

      --
      Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
    84. Re:eating by clone53421 · · Score: 1

      Let's just say that I think your idea of what's "funny" is a little bit strange

      You wouldn’t be the only one.

      --
      Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
  3. They're Zerg. Duh. by Rei · · Score: 3, Funny

    Any other questions that could be easily answered by playing Starcraft?

    --
    Stop it, stop it, it's fine. I will *destroy* you.
  4. No you don't by kiick · · Score: 3, Insightful

    As everybody knows....
    It's not easy being green.

  5. Nitpick by Drethon · · Score: 1, Troll

    No I didn't read the article, MSNBC rarely loads properly here at work.

    I believe that saying it gains energy via photosynthesis is incorrect. Photosynthesis causes a chemical reaction that converts Carbon Dioxide and Water (CO2 and H2O) into Sugar and Oxygen (C6H12O6 and O2). The sugar is then metabolized (correct term?) into energy.

    1. Re:Nitpick by Attila+Dimedici · · Score: 1

      No I didn't read the article, MSNBC rarely loads properly here at work. I believe that saying it gains energy via photosynthesis is incorrect. Photosynthesis causes a chemical reaction that converts Carbon Dioxide and Water (CO2 and H2O) into Sugar and Oxygen (C6H12O6 and O2). The sugar is then metabolized (correct term?) into energy.

      Converting CO2 and H2O to sugar and oxygen requires energy, that energy comes from the sun. So saying that it obtains energy via (which means "by way of") photosynthesis is correct.

      --
      The truth is that all men having power ought to be mistrusted. James Madison
    2. Re:Nitpick by Anonymous Coward · · Score: 0

      Well it gains chemical energy which can be stored or transformed into mechanical energy.

    3. Re:Nitpick by Anonymous Coward · · Score: 0

      The sugar is then metabolized (correct term?) into energy.

      This means, of course that you will still need to eat. You won't need to eat carbs, but you will still need your protein, vitamins, etc.

      Presumably you will eat a lot less, and will gain a lot more weight when you do eat carbs.

      If humans could get photosynthetic skin, they would also need to get their taste buds altered to find straight protein delicious, or the current obesity epidemic will look like a famine by comparison.

    4. Re:Nitpick by kmcarr · · Score: 5, Informative

      No, the statement is essentially correct. The slugs harvest (i.e. gain) energy via trapping photons with chlorophyll. They store that energy as chemical bonds in sugar molecules. They then release the energy as needed by metabolizing the sugar. Photosynthesis is the coupled capturing and storing of energy so saying that it "gains" energy via photosynthesis is a reasonable simplification.

    5. Re:Nitpick by Anonymous Coward · · Score: 0

      Photosynthesis causes a chemical reaction that uses ENERGY that is GAINED from sunlight to convert Carbon Dioxide and Water (CO2 and H2O) into Sugar and Oxygen (C6H12O6 and O2).

      fixed that for ya

    6. Re:Nitpick by Anonymous Coward · · Score: 0

      No I didn't read the article, MSNBC rarely loads properly here at work.

      I believe that saying it gains energy via photosynthesis is incorrect. Photosynthesis causes a chemical reaction that converts Carbon Dioxide and Water (CO2 and H2O) into Sugar and Oxygen (C6H12O6 and O2). The sugar is then metabolized (correct term?) into energy.

      Splitting hairs is more like it. By that same logic you can say that coal isn't an energy source because it's simply the result of a chemical reaction caused by the sun a 100+ million years ago. The slugs are using the sun's energy much as plants do to covert chemicals into sugars which they can use as fuel. If you had read the article the bigger issue is they may absorb the chlorophyll initially but they are able to reproduce it themselves from there. They are very close to being a hybrid between plants and animals and maybe in a few thousand years they will bridge that gap by being born with the ability to create chlorophyll. It's more about the plant and animal kingdoms than semantics about energy production processes.

    7. Re:Nitpick by Drethon · · Score: 2, Informative

      Actually the hairs I'm trying to split is the difference between energy and an energy source.

      Photosynthesis is not like solar power generation that converts sunlight into a different form of energy (electricity).

      Instead it uses the energy to produce an energy source (similar to coal as you point out). This energy source is then metabolized into energy. The sun's energy is used indirectly.

      Still it is very cool to see an organism that isn't a plant being able to use the sun for more than just heat.

    8. Re:Nitpick by skine · · Score: 2, Informative

      To summarize the article:

      Slugs have somehow included algae DNA with its own, and are now capable of actual photosynthesis. The DNA that was copied didn't code for the creation of chloroplasts, so the slugs have to consume a sufficient amount of algae before they can begin the process.

      As long as they are exposed to light for 12 hours per day, they can live without the need for food.

    9. Re:Nitpick by Gerafix · · Score: 1

      Well to properly nitpick - to take out the energy middleman you'd need to firstly be your own fusion device as the sun is the real middleman. The sun isn't the source of energy it is simply an energy source as atoms are a source of energy, the sun just brings them together.

    10. Re:Nitpick by kungfugleek · · Score: 1

      Slugs have somehow included algae DNA with its own

      Good thing it wasn't frog DNA. Then they'd be able to reproduce, too!

    11. Re:Nitpick by Drethon · · Score: 1

      Isn't that similar to normal digestion in a way?

      I know the stomach uses acid to break down food but I believe we use bacteria to actually process the food, we are not capable to do it without the help of another organism.

      So similarly the slug cannot processes the sun, water and carbon dioxide without the help of an outside source. Though this source does not reproduce itself so must constantly be replenished.

      The above assumes I remember my biology correctly...

    12. Re:Nitpick by DahGhostfacedFiddlah · · Score: 1

      You might want to look up the word "via".

    13. Re:Nitpick by osu-neko · · Score: 1

      So, in other words, the statement is entirely correct, and your nit is incorrect if you're trying to say they don't produce energy from sunlight, but is correct if you're trying to say they produce energy from sunlight in a multi-step process, precisely like plants do, rather than a single-step process (which is not implied by the original statement, which is why it is entirely correct, despite your objections).

      --
      "Convictions are more dangerous enemies of truth than lies."
    14. Re:Nitpick by osu-neko · · Score: 1

      The sun isn't the source of energy it is simply an energy source as atoms are a source of energy

      The sun is atoms. Lots of them. Your nitpick is a logical absurdity of the (P and ~P) form.

      --
      "Convictions are more dangerous enemies of truth than lies."
    15. Re:Nitpick by mea37 · · Score: 2, Informative

      If you think about the laws of thermodynamics, you will realize that "uses the energy to produce an energy source" is just a confusing way to say "cnoverts the energy to another form and stores it".

    16. Re:Nitpick by smellsofbikes · · Score: 2, Informative
      You have to be pretty liberal with your definition of digestion.

      Here's the thing. Animal cells have the ability to do a lot of biochemistry, but they have very limited ability to do some exotic chemistry that is essential to animal life. The major example of this is a molecule called adenosine triphosphate, aka ATP. All life uses ATP as an energy source.... lemme back up. Chemical reactions are reversible. To get from the reactants to the products requires that you put in a certain amount of energy to get to an intermediate state, and then you get out a certain amount of energy as it goes to the final state. We generally regard the reactant state as higher-energy than the product state (although that's not necessarily true: if you're consistently pulling out one of the reactants, you'll consistently push the products to become reactants.) Enzymes serve to lower the energy that it takes to go from reactants to products.

      There are certain classes of chemical reactions that the body *really* wants to force in one direction, so what happens is we have enyzmes that take reactants and ATP, and by splitting the ATP into adenosine diphosphate and a phosphate group, which releases a *lot* of energy, the reactant - product reaction is driven in the direction the body wants. The thing is: animal cells don't have the ability to make ATP. It's a difficult thing to make, and takes a lot of energy (of course, since it releases a lot of energy when it breaks down, it takes more to make the molecule.) So what animal cells have done is ingest bacteria, which we now call mitochondria: they were captured (maybe a billion years ago) and are now used to do the weird chemistry our cells can't do alone. The bit where eukaryotic (animal and plant) cells captured bacteria is where we developed the ability to be large multicellular creatures, rather than just a few cells sort of cooperating. Plants have done the same thing, twice: both mitochondria and chloroplasts are captured bacteria. Chloroplasts contain the structures that convert the energy of captured photons into high-energy molecules that plants use to drive their complicated reactions.

      So, these sea slugs have done two interesting things: they've developed the ability to make their own chlorophyll, which is pretty amazing, the equivalent of finding a plant that can make hemoglobin, and they've managed to accomplish the same sort of symbiotic relationship with cyanobacteria that plants and animals did roughly a billion years ago when they formed mitochondria and chloroplasts. The sea slugs are engaging in convergent evolution and ending up with both plant and (primarily) animal characteristics.

      --
      Nostalgia's not what it used to be.
    17. Re:Nitpick by Anonymous Coward · · Score: 0

      His point is that the atoms of the sun are storing energy, presumably from supernovae and the Big Bang... Atoms are a "source" of energy in the sense of "sources" and "sinks". A "region/object" where energy is concentrated and from which it will eventually leak away.

    18. Re:Nitpick by Drethon · · Score: 1

      Cool read, thanks!

    19. Re:Nitpick by Antisyzygy · · Score: 1

      That is an interesting way of looking at it. I sort of always thought evolution to multi-cellular organisms was like a symbiotic relationship or communal relationship that evolved into more complex forms, but I never thought of it as animal cells "capturing" precursors to mitochondria. I understand your use of this word as more of "acquiring".

      --
      That brings me to an interesting point, / . is just "the ramblings of socially-inept, technology-literate news-mongers".
    20. Re:Nitpick by smellsofbikes · · Score: 1
      It's an ambiguous relationship. Consider chlamydia or leprosy: the bacterial cells live inside animal cells and suck nutrients from them, often killing them. That's clearly parasitic. In lichen, the stuff you see on rocks at high altitude, there are bacteria and fungi growing together as practically one organism. That's symbiotic: they couldn't do without each other. Now consider many of the bacteria that live in our stomachs, who take very little energy from us, but without us, they'd be dead: that's commensal, where one side gets all the advantage and the other side doesn't get or give anything much.

      So the thing about mitochondria is: it's completely possible they were parasites like chlamydia, and eukaryotic cells just managed, at some point, to live with them rather than getting killed by them -- became commensal with them, in other words -- and then, later on, found that the reactions the bacterial-derived mitochondria were performing were incredibly useful to the cell, at which point it became symbiotic, and then even later the mitochondria lost the ability to self-replicate and became a fundamental part of the cell, at which point there isn't any reasonable way to say they're separate organisms anymore.

      So I'm really throwing a lot of material away when I say 'captured', and we probably can't actually know whether it was originally parasitic or what. Obviously it worked out to the benefit of both parties: whatever bug originally managed to get itself functional within a cytoplasm has had its genes spread unbelievably widely, and we rely on it for our very existence.

      --
      Nostalgia's not what it used to be.
    21. Re:Nitpick by Hecatonchires · · Score: 1

      Imagine if they had used frog DNA to fill in the gaps, and then left an all male population of of slugs somewhere like an island...

      --

      Yay me!

  6. I want the reverse. by jeffb+(2.718) · · Score: 5, Interesting

    I want to be able to consume as many extra calories as I like, and then radiate the excess as visible light, with radiant area, spectrum and direction under my conscious control.

    Or, at least, I'd like to be able to metabolize my food and store excess energy as electric charge, easily transferred to whatever devices are handy.

    1. Re:I want the reverse. by Jarik+C-Bol · · Score: 1

      i think i like this idea.

      --
      I've decided to Diversify my Holdings. I've divided my cash between my left and right pockets, instead of all in one.
    2. Re:I want the reverse. by flabordec · · Score: 1

      And then we would be hearing about the worst ecological disaster to ever strike earth: global lightning.

      --
      "I see undead people" Warcraft III - Necromancer
    3. Re:I want the reverse. by Xtravar · · Score: 1

      It seems you've been playing too much inFamous. Now glucose powered devices that run off your blood stream, that seems more feasible.

      --
      Buckle your ROFL belt, we're in for some LOLs.
    4. Re:I want the reverse. by ArsonSmith · · Score: 4, Funny

      This would be awesome. having a + and - poll could give men's nipples a purpose.

      --
      Paying taxes to buy civilization is like paying a hooker to buy love.
    5. Re:I want the reverse. by Kratisto · · Score: 5, Funny

      If you can make that light coherent and focused, you can be some sort of super hero. Laser Pointer Assisted Presentation Man! Is it a CEO? Is it a college professor? No! It's Laser Pointer Man! Boring wrongdoers into soporific oblivion at the speed of light! Taunting cats in his free time...

      --
      Conscience is the inner voice which warns us that someone may be looking.
    6. Re:I want the reverse. by TheLink · · Score: 1

      Modern man in effect eats a fair bit of oil and coal. It allows them to generate light, travel great distances fast etc.My car consumes about as much in $$$ terms as I do per month.

      But yeah, being a superhuman could be fun :).

      What you might want in addition to your lightbeams and electric zapping superpowers is the ability to use energy from an external power source to power your anaerobic metabolic modes = e.g. you can sprint and not get tired[1] till you run out of energy from that power source.

      While power armor and exoskeletons might help do the same thing, the augmentation I'm talking about could be a bit more discreet and less "in your face".

      [1] You probably need a better cooling mechanism though than just sweating: http://www.wired.com/wired/archive/15.03/bemore_pr.html
      Cheetahs can run very fast, but a big limiting factor appears to be overheating.

      --
    7. Re:I want the reverse. by Anonymous Coward · · Score: 0

      Bicycle with a dynamo attached. Easy.

    8. Re:I want the reverse. by Hurricane78 · · Score: 1

      Well, the problem would be that you then would also be very hot. And not in the good sense. More in the “spontaneous combustion” sense. ;)

      But I agree that a way to not use unnecessary calories without an effort would be great. Decadent beyond belief. But great. ;)

      You already have metabolized it into a storage. That’s your fat. You just never use it up. I once calculated, that if released all at once, the fat in my body would give enough power to run a flux compensator for 0.88 seconds. No shit!

      Wait, according to Wikipedia, chemical energy can be transformed to electric energy by a fuel cell. Hmm... intriguing. ;)
      And it can be transformed to electromagnetic radiation (light) by... glowworms! Now that’s an odd one!

      So I recommend a glowworm gene therapy and a built-in fuel cell (wetware) in your belly. :)

      P.S.: Anyone got better ways of transformation? Those Wikipedia examples are lacking a bit.

      --
      Any sufficiently advanced intelligence is indistinguishable from stupidity.
    9. Re:I want the reverse. by sarahbau · · Score: 1

      That's so much better than my idea of a bicycle powered TV. With your method, you could power the TV directly, just by eating.

    10. Re:I want the reverse. by Anonymous Coward · · Score: 0

      http://www.blisstree.com/articles/dynamo-hand-powered-flashlight-kit-71/

      That is all.

    11. Re:I want the reverse. by zullnero · · Score: 1

      It'd be awesome up to the point where you realize that 7 billion people eating everything in sight drained the global food supply. Then you'll be wishing you had that photosynthesis.

    12. Re:I want the reverse. by Gerafix · · Score: 1

      I don't know about you but mine already serve a purpose. There be nerve endings on them ya land lubber.

    13. Re:I want the reverse. by noidentity · · Score: 1

      I want to be able to consume as many extra calories as I like, and then radiate the excess as visible light

      I want to be able to radiate invisible light, perhaps also radiate cold heat and dry water.

    14. Re:I want the reverse. by BlackPignouf · · Score: 1

      Just eat some lava, and heat yourself up to a >1000K
      You'll radiate as visible light!

    15. Re:I want the reverse. by paintballer1087 · · Score: 2, Funny

      I am intrigued by your ideas, and wish to subscribe to your newsletter.

    16. Re:I want the reverse. by clone53421 · · Score: 1

      Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye

      Is not the same as:

      Light is electromagnetic radiation of a wavelength that is visible to the human eye

      --
      Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
    17. Re:I want the reverse. by Anonymous Coward · · Score: 0

      After reading TFA it sounds like you need some of your car DNA. Perhaps if you eat it...

    18. Re:I want the reverse. by lewp · · Score: 1

      Personally, when I feel so stuffed I can't eat any more, I just use the restroom. Then I can eat more.

      --
      Game... blouses.
    19. Re:I want the reverse. by osu-neko · · Score: 1

      And then we would be hearing about the worst ecological disaster to ever strike earth: global lightning.

      Actually, light pollution is already a serious problem for astronomers, and we've been hearing about it for decades already.

      --
      "Convictions are more dangerous enemies of truth than lies."
    20. Re:I want the reverse. by Anonymous Coward · · Score: 0

      I want to be able to consume as many extra calories as I like, and then radiate the excess as visible light, with radiant area, spectrum and direction under my conscious control.

      Hopefully you'd be able to control it easily. You don't want to glow in places that you prefer to keep non-glowy.

    21. Re:I want the reverse. by osu-neko · · Score: 1

      Well, the problem would be that you then would also be very hot. And not in the good sense. More in the “spontaneous combustion” sense. ;)

      Not necessarily. Depending on how well it's done, it could actually cool you down rather than heat you up. A perfect efficiency, the process would cause you to die of hypothermia.

      --
      "Convictions are more dangerous enemies of truth than lies."
    22. Re:I want the reverse. by adisakp · · Score: 1

      Or, at least, I'd like to be able to metabolize my food and store excess energy as electric charge, easily transferred to whatever devices are handy.

      Hook an excercise bike up to a generator which is connected to a battery. Satisfies your requirements other than the "easy" part.

    23. Re:I want the reverse. by apoc.famine · · Score: 1

      Eh, screw radiating it all over - I want to focus it out of my eyes, or perhaps a finger. That'd rock!

      --
      Velociraptor = Distiraptor / Timeraptor
    24. Re:I want the reverse. by BotnetZombie · · Score: 1

      And we get a car analogy as well - thank you.

    25. Re:I want the reverse. by jeffb+(2.718) · · Score: 1

      If you would be so kind as to go soak your head in a large reservoir of liquid nitrogen for a few hours, you'll have your opportunity. Your head will be radiating light/heat at a blackbody temperature around 77K, which is (a) invisible and (b) cold. For the "dry water" part, well, frozen tissue at 77K really isn't very "wet" at all, except in the chemical sense.

    26. Re:I want the reverse. by jeffb+(2.718) · · Score: 1

      Well played. In fact, once you've got the charge in the battery, I'd argue that it is "easily transferred to whatever devices are handy".

      It would be nice to have a more direct metabolic conversion, though, preferably one that doesn't generate quite so much sweat, fatigue, and boredom.

    27. Re:I want the reverse. by MiniMike · · Score: 1

      Ugh. I don't want to need welding goggles just to drive by McDonalds.

    28. Re:I want the reverse. by noidentity · · Score: 1

      If you would be so kind as to go soak your head in a large reservoir of liquid nitrogen for a few hours, you'll have your opportunity. Your head will be radiating light/heat at a blackbody temperature around 77K, which is (a) invisible and (b) cold.

      My head would be absorbing heat. It may be radiating some EM (but not light, I don't think).

    29. Re:I want the reverse. by svtdragon · · Score: 2, Funny

      Yeah, but do you really want to volunteer your nipples to be on one end of a set of jumper cables?

    30. Re:I want the reverse. by vlm · · Score: 1

      Well, the problem would be that you then would also be very hot.

      Not so bad for someone dying of hypothermia. Titanic sinks, skinny people instantly croak, fat ones could swim around at least until they dehydrate in a couple days?

      I wonder how much fat I'd burn per hour to keep warm if I literally went swimming with the penguins?

      I'm guessing it would be comparable to continuously heating up a large water heater using heating oil... maybe a couple pounds per hour?

      --
      "Science flies us to the moon. Religion flies us into buildings." - Victor Stenger
    31. Re:I want the reverse. by Anonymous Coward · · Score: 0

      ..give men's nipples a purpose.

      Men's nipples already have a purpose. It's the same purpose as womens' nipples, to produce milk for a suckling baby. Yes, men can lactate and produce milk, they have all the necessary machinery inside.

      Of course men can't produce nearly as much milk as women but with the proper stimulation men do begin to lactate. 3 guesses what that stimulation might be, and the last two don't count.

      If you don't believe me, google "male breast cancer" (with the quotes). Men can get breast cancer for exactly the same reason women can.

      If you're a man and this upsets you, think of this as an argument for topless beaches - if a man can walk around topless, why can't a woman?

    32. Re:I want the reverse. by Chris+Burke · · Score: 1

      Depending on where the laser comes from, I can also imagine him being either Arrested for Indecent Exposure Man, or Constantly Getting Slapped by Women Who Can See Where He's Looking Man.

      --

      The enemies of Democracy are
    33. Re:I want the reverse. by suomynonAyletamitlU · · Score: 1

      Even assuming the GP is correct, that assumes that the cold doesn't take more energy out of you than your newly augmented body puts out. The surface area to volume ratio of a human is pretty high, especially in the case of your extremeties, where you have a very small area (the base of your finger, say) that all the expended energy has to first flow through. If it doesn't get enough energy, with prolonged exposure, you lose your finger/hand/arm/nose/ear/toe/foot/leg/whatever.

      In normal humans, the problem is the same. You can get frostbite in the limbs to the point at which they can't be saved and have to be amputated, and yet still survive, specifically because the body doesn't try to waste energy on those things when it needs to make sure the organs are safe.

      Disclaimer: Not a biologist or physician. Consult a doctor before amputating anything. Erections lasting longer than four hours are disturbing and I don't want to hear about them.

    34. Re:I want the reverse. by Thiez · · Score: 1

      > But yeah, being a superhuman could be fun :).

      Humans are actually pretty awesome already. Funny you mentioned cheetahs overheating, they're not the only ones: http://www.youtube.com/watch?v=9wI-9RJi0Qo

      I don't have the endurance for it, but I think the whole 'persistence hunt' thingy is just plain badass.

    35. Re:I want the reverse. by Anonymous Coward · · Score: 0

      Bioshock, actually. The plasmid technology came from sea slugs.

    36. Re:I want the reverse. by neurospyder · · Score: 1

      Why would this upset me. It's like two new squirt guns I didn't know about. My office mate's in a world of trouble...

  7. Photosynthesize! by The+Yuckinator · · Score: 3, Interesting

    Once you've "eaten enough algae to steal the necessary chloroplasts", you'll be good to go!

    I would happily endure eating algae for X days/weeks/months in order to get photosynthesis going in my body. I realize that I'd have to start going outside, but it sounds like a fair trade off to me.

  8. You do realize by marcus · · Score: 1

    That you'll still have to eat something and eating like a plant means eating ... fertilizer.

    --
    Good judgement comes from experience, and experience comes from bad judgement.
    - W. Wriston, former Citibank CEO
    1. Re:You do realize by mooingyak · · Score: 1

      That you'll still have to eat something and eating like a plant means eating ... fertilizer.

      Nah, you can just absorb that stuff through your roots.

      --
      William of Ockham had no beard. The most likely explanation is that it was chewed off by squirrels every morning.
  9. Soylent green by Anonymous Coward · · Score: 0

    Soylent green makes people...er no, green people make soylent...or, soylent people made green (shrug)

  10. I call dibs on making fuel out of them.... by Anonymous Coward · · Score: 0

    ...for my car. That would be ironic, wouldn't it Alanis?

  11. been a while since bio class by Taibhsear · · Score: 2, Interesting

    In a normal plant cell is the chlorophyll produces by the cell and then shuttled to the chloroplast to be used or does the chloroplast itself produce the pigment within it's own membrane? If the latter, I would imagine this gene in the slug is redundant as the creature has to eat algae for the chloroplasts anyways.

    1. Re:been a while since bio class by reverseengineer · · Score: 5, Informative

      Chloroplasts, just as with mitochondria, have a small DNA genome of their own. Due to the endosymbiotic relationship that has formed between chloroplasts and their photosynthetic hosts, chloroplasts have found it convenient to offload the majority of their genes to the nucleus. It is estimated that about 90% of the genes necessary for photosynthesis are nuclear, with the rest in chloroplasts, so these sea slugs appear to have acquired the nuclear genes, but not the chloroplast genes.

      Chlorophyll itself is made in the cytoplasm, and actually requires relatively few new genes for an animal to be able to produce it, since the complicated steps of its biosynthesis are identical to the heme structures it is already able to make. The real difficulty, and one that this sea slug seems to have been able to surmount according to the Wikipedia page, is the production of the "oxygen-evolving complex," a metalloenzyme with a manganese-calcium core which transfers absorbed energy to a bound water molecule to break it into electrons, protons, and molecular oxygen. Heterotrophic organisms don't produce anything like it.

      --
      "FDA staff reviewers expressed concern about the number of patients who were left out of the study because they died."
  12. Adam by Anonymous Coward · · Score: 0

    Now they just need to produce a miraculous substance to be dubbed "Adam"...

  13. Star Trek IV by Anonymous Coward · · Score: 0

    "We are looking for the Nuclear Wessles."

    1. Re:Star Trek IV by jbezorg · · Score: 1

      Chief Engineer Olson ( red shirt ) managed to kill himself. That was a welcomed and unexpected plot twist and I applaud the creativity in which it was accomplished.

      --
      I've lost all my marbles except one & It's fun to test angular & centripetal acceleration in my skull
  14. Exactly, eating like a plant by marcus · · Score: 1

    Means you'll be sucking up ... "fertilizer".

    --
    Good judgement comes from experience, and experience comes from bad judgement.
    - W. Wriston, former Citibank CEO
    1. Re:Exactly, eating like a plant by mooingyak · · Score: 1

      Shortcut the whole process and just stand in the toilet.

      --
      William of Ockham had no beard. The most likely explanation is that it was chewed off by squirrels every morning.
    2. Re:Exactly, eating like a plant by funwithBSD · · Score: 2, Funny

      Don't piss on my leg and tell me it is good for me.

      --
      Never answer an anonymous letter. - Yogi Berra
    3. Re:Exactly, eating like a plant by mooingyak · · Score: 3, Funny

      What should I say then when I piss on your leg?

      --
      William of Ockham had no beard. The most likely explanation is that it was chewed off by squirrels every morning.
    4. Re:Exactly, eating like a plant by clone53421 · · Score: 5, Funny

      I’d say, “hi, did you realise that you’re standing in the toilet?”

      --
      Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
    5. Re:Exactly, eating like a plant by Jeng · · Score: 1

      I thought we already produce "fertilizer" ?

      Would that mean that we would no longer have to go to the bathroom, or would it only just give a different meaning to the term "Morning Wood" ?

      --
      Don't know something? Look it up. Still don't know? Then ask.
    6. Re:Exactly, eating like a plant by vlm · · Score: 1

      Shortcut the whole process and just stand in the toilet.

      Water? Like out of a toilet? No man, you need Brawndo. Its got electrolytes.

      --
      "Science flies us to the moon. Religion flies us into buildings." - Victor Stenger
    7. Re:Exactly, eating like a plant by funwithBSD · · Score: 1

      It's good to be the King?

      --
      Never answer an anonymous letter. - Yogi Berra
  15. you'd still need to eat by Anonymous Coward · · Score: 1, Insightful

    This might be used to supply a maintenance level of energy such that if your activity level was relatively low and in an environment where you could get enough sun and water, it might keep you alive until you can get to a better situation but I doubt it could supply enough energy to keep an athletic person performing at their peak level. For instance, I doubt we'd see someone be able to do the Tour de France on self supplied sugars.

    I could see some basement dwelling computer nerds trying this and setting up enough brights lights and such that the local police might think it was a grow-op in operation.

    1. Re:you'd still need to eat by Anonymous Coward · · Score: 0

      Human skin are very flexible and stretchy. So it is possible to increase the skin area.

      Ask anybody that have been really obese and lost that extra weight.

  16. Gene transfer question? by gr8_phk · · Score: 2, Interesting
    The article seems to indicate that the genes to produce chlorophyll can be passed on to offspring. But then:

    The slugs accomplishment is quite a feat, and scientists aren't yet sure how the animals actually appropriate the genes they need.

    Wouldn't that be a fluke that only needed to happen once? They do point out that the animals also have to get chloroplasts by eating plant material (these are not passed on to offspring), so perhaps they meant to say they aren't sure how they appropriate the chloroplasts. I would agree that's a really good question.

    1. Re:Gene transfer question? by osu-neko · · Score: 3, Insightful

      Wouldn't that be a fluke that only needed to happen once?

      Calling it a "fluke" is not an explanation. The thing about scientists is, they like to find out how these "flukes" happen.

      --
      "Convictions are more dangerous enemies of truth than lies."
    2. Re:Gene transfer question? by Anonymous Coward · · Score: 0

      Wouldn't that be a fluke that only needed to happen once?

      isn't that how most people think we got here? fools...

    3. Re:Gene transfer question? by gr8_phk · · Score: 1

      The word "appropriate" suggests an ongoing process open to study. I would suggest "appropriated" might be the case a long time ago.

  17. Sea Slugs and nematocysts by Guppy · · Score: 4, Interesting

    Some species of Sea Slugs have another similar interesting ability -- to adsorb and host nematocysts (stinging cells) from jellyfish and hydrozoans they've eaten, and use them for their own defense. The mechanism is substantially different (foreign cells are sequestered in specialized sacs, compared to the intracellular hosting of an organelle) though.

    http://en.wikipedia.org/wiki/Glaucus_atlanticus

    1. Re:Sea Slugs and nematocysts by jameskojiro · · Score: 1

      Slugs, the Peter Petrellis of the animal kingdom....

      --
      Tsukasa: All I really want, is to be left alone...
  18. There are other ways to do this by Locke2005 · · Score: 2, Interesting

    Couldn't you just form an symbiotic relationship with algae or photoplankton, allowing them to live inside you for protection in return for using them for energy? Aren't there already animals that do this?

    --
    I've abandoned my search for truth; now I'm just looking for some useful delusions.
    1. Re:There are other ways to do this by sydneyfong · · Score: 1

      We already do almost that (except the inside body part). It's called agriculture :)

      --
      Don't quote me on this.
    2. Re:There are other ways to do this by osu-neko · · Score: 2, Informative

      Couldn't you just form an symbiotic relationship with algae or photoplankton, allowing them to live inside you for protection in return for using them for energy? Aren't there already animals that do this?

      There are. That process is well understood, and thus, not all that interesting to scientists. What this slug does in addition to that is novel and thus interesting.

      --
      "Convictions are more dangerous enemies of truth than lies."
    3. Re:There are other ways to do this by IronChef · · Score: 1

      You're correct. Many kinds of coral do this, as do some clams and nudibranchs.

      The relationship between host and algae partner can be kind of delicate in corals, though. Being able to make your own photosynthetic apparatus could be a more robust system.

    4. Re:There are other ways to do this by vlm · · Score: 1

      Couldn't you just form an symbiotic relationship with algae or photoplankton, allowing them to live inside you for protection in return for using them for energy? Aren't there already animals that do this?

      Thats very roughly the deal we have with the bacteria in our guts.
      If we were transparent, we could make the same deal with algae.
      Maybe if we swallowed a lot of flashlights?

      --
      "Science flies us to the moon. Religion flies us into buildings." - Victor Stenger
    5. Re:There are other ways to do this by RivenAleem · · Score: 1

      Medichlorians

  19. Eating is not just energy by gmuslera · · Score: 1

    Building and repairing too. And well, there are those that enjoy the taste of some food. Anyway, having an extra source of energy won't hurt, you dont always need to be building and repairing, or at least could do it in a less urgent way than for getting the energy needed to live.

  20. What about ADAM? by Silpheed · · Score: 1

    How can I get my Electric Bolt 3 without ADAM?

    1. Re:What about ADAM? by SPQR_Julian · · Score: 1

      Finally. I saw the headline and came here hoping for a plethora of BIOSHOCK jokes. I'm disappointed in you, Slashdot!

  21. Actual evolution? by DaveV1.0 · · Score: 1

    Is this actual, observed evolution?
    Is this the proof creationists are always demanding?

    --
    There is no "-1 offended" or "-1 you don't agree with me" mod options for a reason.
    1. Re:Actual evolution? by CorporateSuit · · Score: 1

      No. Studying something unique in the animal kingdom for 20 years does not make it evidence for anything. The slug is able to build chlorophyl from borrowed chloroplasts -- something no other animal has done. How long it's been doing that, we don't know. It's something cool and something that biological researchers can observe and attempt to understand outside of the pseudoscientific holy war of the church of evolutionism vs. all other religions. Dragging evolutionism vs creationism into this will only ink up the waters on any research done, and cast biology even further into its current dark age.

      --
      I am the richest astronaut ever to win the superbowl.
    2. Re:Actual evolution? by osu-neko · · Score: 2, Informative

      Is this actual, observed evolution? Is this the proof creationists are always demanding?

      Yes and no. It is one of thousands of examples of observed evolution, and the process is already well proved. This will not stop the demands, however, since the demands are not made in good faith...

      --
      "Convictions are more dangerous enemies of truth than lies."
    3. Re:Actual evolution? by jameskojiro · · Score: 2, Funny

      No, God just invented them with the ability to do this to confuse us all. God loves gettin' his jollies off keep mankind eternally confused.

      --
      Tsukasa: All I really want, is to be left alone...
    4. Re:Actual evolution? by Anonymous Coward · · Score: 0

      I’m amazed, but not really confused. “God did it” is a surprisingly non-confusing explanation, actually. So non-confusing that it’s usually dismissed as childishly simple, but that’s really only a problem to people who think everything has to be confusing...

    5. Re:Actual evolution? by osgeek · · Score: 1

      Creationists demand proof of evolution in the way that I demand a pony when my kids are being whiny. I don't really want a pony and I wouldn't know what to do with one if my demand was met.

      If their demands reflected a sincere desire for proof, then they could easily find and understand it.. No, what Creationists want is to have everyone adhere to their belief that the Bible is the inerrant word of God no matter what proof or common sense may contradict that belief.

      Demanding proof is just an act of posturing to make it look like they're having a real battle of ideas about the nature of reality. Proof is not what they're looking for.

    6. Re:Actual evolution? by Opportunist · · Score: 1

      Sounds like God is a pretty big ass. Lemme outta here, I'm going to find us a better God, this one sucks.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    7. Re:Actual evolution? by Opportunist · · Score: 1

      I wonder why they're so up in arms about it anyway. The bible said god created earth and you're supposed to belive it. Is your faith so weak that you are swayed by a little proof from unbelievers? You didn't get so swayed when other faith systems claimed you're wrong. You stood firm in your believes against every system from the "heathens" to the Muslims, but suddenly science is a threat to your set of ideas and beliefs?

      How is it different this time? The constitution says you may believe what you want, no matter if it's "right" or "wrong" or whether science disproved it, so what exactly is your problem?

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    8. Re:Actual evolution? by osgeek · · Score: 1

      Many humans seek power and domination over others. Religion is just a tool to that end.

      Grabbing for power extends from human nature, not the Bible or religion in general.

  22. So What, It would still be a good thing... by jameskojiro · · Score: 2, Insightful

    Especially in Third world countries where there is plenty of sun, not much food and not much to do other than subsistence living,. At least it would be enough to get a lot of starving humans through the dry famine months that they get in thrid world countries near the equator.

    Sure their skin would be green, but that beats starving to death.

    --
    Tsukasa: All I really want, is to be left alone...
    1. Re:So What, It would still be a good thing... by Anonymous Coward · · Score: 0

      I'm pretty sure if we had the desire and resources to do this to every human being on Earth we would more than be capable of feeding them all conventionally.

    2. Re:So What, It would still be a good thing... by BiggerIsBetter · · Score: 1

      Sure their skin would be green, but that beats starving to death.

      Maybe they could make an arrangement with Captain Kirk for the rest of their needs?

      --
      Forget thrust, drag, lift and weight. Airplanes fly because of money.
    3. Re:So What, It would still be a good thing... by stuckinphp · · Score: 1

      want to bet?

      --
      if only
    4. Re:So What, It would still be a good thing... by Anonymous Coward · · Score: 0

      Except for one little detail people often overlook:

      Photosynthesis requires water.. quite a lot of it actually. So in dry famine months, you'd be out of water anyway, people still couldn't use photosynthesis as a food source, and any available water would have to be used for growing crops.

      Plants are a lot more efficient at this whole "sun into energy" thing than people could ever hope to be.

      (It's the little things that get ya)

  23. Never? by TooMad · · Score: 1

    No more Sushi, no more Chocolate, no more Carrabba's Cozze in bianco. Now if it were something you could switch on and off I would be all for it. No more military chow hall food. I could list more things you wouldn't have to eat but that alone is enough.

  24. The Nigerian leader in District 9 was right! by JoshDM · · Score: 3, Funny

    FTA: "The sneaky slugs seem to have stolen the genes that enable this skill from algae that they've eaten."

    I'm gonna go find and chow down on some ninjas right now, so I gain Real Ultimate Power!!

    1. Re:The Nigerian leader in District 9 was right! by Chris+Burke · · Score: 1

      I'm gonna go find and chow down on some ninjas right now

      The ninjas currently watching you from their hidden vantage points are chuckling (silently) at your ambition.

      One flashes the secret ninja symbol for "good luck with that!"

      --

      The enemies of Democracy are
  25. How is this news? by Anonymous Coward · · Score: 3, Funny

    Slugs have been around for millions of years!

  26. Yes, Sea Anemones for one by NotSoHeavyD3 · · Score: 2, Informative

    Of course the problem with photosynthesis is it doesn't produce energy that quickly so it'd probably be used by slow moving animals like that. Here's a link http://www.nhm.ku.edu/inverts/ebooks/intro.html

    --
    Did you know 80 to 90% of the moderators on slashdot wouldn't recognize a troll even if one dragged them under a bridge.
  27. forget absorbling light by ajrs · · Score: 1

    I want to emit light. at will. So I don't need a flashlight, or could get a job as an organic tanning booth and loose weight at the same time. Or, dare I say, sparkle when outdoors.

    1. Re:forget absorbling light by Opportunist · · Score: 1

      No chance. You'd have to do a reversal of photosynthesis. Basically you take in sugar and oxygen and emit light. It would sure be a cool project but your carbon footprint would make Al Gore cry.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
  28. I know i do. by unity100 · · Score: 1

    if you take time to think how much of our time passes while doing mandatory eating, strenous digesting and dealing with the excrement and crapping it, you would be appalled.

    in addition, a good deal of energy we take in by eating is spent on digesting the food itself. check your body in an atlas. almost 1/3 of the internal organs are allocated to digestion.

    imagine cutting out the middleman.

  29. news? by SerpensV · · Score: 1

    i've heard about this slug a few years ago. How is it news?

    1. Re:news? by kmcarr · · Score: 1

      Yes, photosynthetic slugs have been known for years (decades). What was unknown was whether any of the genes required for photosynthesis have been incorporated into the genome of the animal as opposed to solely using the genetic material in the consumed chloroplasts. (Yes, chloroplasts do have their own genome.) It was just now shown and reported that the genes to make chlorophyll have in fact been stably incorporated into the slug's genome. That is news.

    2. Re:news? by SerpensV · · Score: 1

      OK, that's really news, I should've RTFA. Among procaryotes (like bacteria) it's common. Some viruses can insert their genes into their host's genomes. However, it's the only eucaryote (organism with a nucleus in cell) that I know to incorporate genes on it's own. Are there any other?

  30. Yes. by Comboman · · Score: 1

    Yes, corals do this. Contrary to popular belief, corals are not plants but animals living in a symbiotic relationship with algae.

    --
    Support Right To Repair Legislation.
  31. Whatever, Captain Sunshine! by jameskojiro · · Score: 1

    Just try not to get Wonder Boy killed off will ya?

    --
    Tsukasa: All I really want, is to be left alone...
  32. See, this is why we shouldn't discount cannibalism by macraig · · Score: 1

    Eating the brains of our slain foes is probably as close as we'll ever get to a Highlander quickening. These slugs are already workin' their way up the ladder, and they just might be coming for YOUR brains in a few years....

  33. Exactly right by SteveFoerster · · Score: 1

    I too think that ABC Family are a bunch of sea slugs for having canceled The Middleman.

    --
    Space game using normal deck of cards: http://BattleCards.org
  34. Feedback loop by DarkofPeace · · Score: 1

    So, the fatter you get, the more skin, then more energy from the sun, more fat, more skin, ect...

    1. Re:Feedback loop by Opportunist · · Score: 1

      More weight also means your basic metabolic rate goes up. Yes, that means if you're REALLY fat you will actually lose weight with a normal calorie intake.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
  35. Re:They're Zerg. Duh. by IICV · · Score: 1

    Any other questions that could be easily answered by playing Starcraft?

    Did Mark McGwire use steroids?

  36. green chicks by Anonymous Coward · · Score: 0

    That green chick in the latest Star Trek didn't seem SLUGgish, and I'm assuming she was capable of photosythesis. You would probably see her running around outside nekked most of the time, which is just fine with me. The problem with me being green and nekked outside with the likes of her is that I'd be WOOD most of the time and I might be mistaken for a tree.

  37. world food problems solved by Anonymous Coward · · Score: 0

    Just implant this gene through vaccination and the world food problems are solved!

  38. fixed that for ya by HydroPhonic · · Score: 1

    ...having a + and - pole could...

  39. Lamarckism by Scarbo27 · · Score: 2, Interesting

    According to TFA: 'In fact, the slugs incorporate the genetic material so well, they pass it on to further generations of slugs." Isn't this the long-discredited (allegedly) Lamarckism? Passing on acquired characteristics to the next generation is Lamarckism. And if this isn't Lamarckism, could someone explain why I am wrong? And how can there be 210 comments and, as far as I can tell, no one else noticed this?

    1. Re:Lamarckism by u38cg · · Score: 2, Interesting

      Don't be scared. This sort of thing happens quite a lot. And Lamarckism is not completely dead: although it isn't the main driver of evolution, there are plenty of examples of it in action.

      --
      [FUCK BETA]
  40. Lamarck was right? by Anonymous Coward · · Score: 0

    "In fact, the slugs incorporate the genetic material so well, they pass it on to further generations of slugs."
    This is huge news. A demonstration of Lamarckism in action.

  41. Never eat again? Ask Roger Ebert about that. by lpaul55 · · Score: 2

    Roger Ebert recently wrote about his life after surgery. He can no longer take anything by mouth. I can't imagine life without taste, but he lives it.

    --
    ... now back to the bit mines.
  42. From TFA "turning sunlight into energy" by jamesswift · · Score: 1

    I hate it when it's phrased like that.

    --
    i wish i could stop
  43. We still get surprised by Anonymous Coward · · Score: 0

    ....and it taste like chicken

    There's so much about animal biology we don't understand.