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15 Mutations Resulted In Increased Brain Size

naoursla writes "Researchers at the University of Chicago think they have identified 15 mutations in a gene responsible for brain development that gave humans abilities of abstract thought and planning. The article is at Discover. They plan to insert the gene into mice to 'to see what affect it has on brain development.'"

44 of 193 comments (clear)

  1. Pinky and the Brain by gavinroy · · Score: 5, Funny

    It doesnt seem too far fetched now does it? How long until global mouse domination?

  2. Someone has to say it. by smack_attack · · Score: 3, Funny

    The result of the experiment? 42.

    1. Re:Someone has to say it. by Muhammar · · Score: 2, Funny

      Mice-financed, this thing was. This is the End. (But let me read you some poetry first).

      --
      I doubt that we will ever figure out - and I suspect that even if we did figure out we couldn't do much about it
  3. Narf.... by synaptik · · Score: 5, Funny
    It doesnt seem too far fetched now does it? How long until global mouse domination?

    I don't think we have to worry, so long as we don't make rubber pants their size.
    --
    HSJ$$*&#^!#+++ATH0
    NO CARRIER
    1. Re:Narf.... by Directrix1 · · Score: 2, Funny

      Planet of the Mice, just isn't quite as catchy.

      --
      Occam's razor is the blind faith in the natural selection of least resistance and in universal oversimplification. -- EF
  4. Would the skulls get bigger too? by TheLink · · Score: 5, Funny

    Big brains in small skulls might not be such a good idea...

    --
    1. Re:Would the skulls get bigger too? by Otter · · Score: 3, Interesting
      Remember, infant primates (I think it's not just humans) have extremely plastic skulls with distinct pieces that eventually fuse. You're right that over time skulls (and women's pelvises) would need to change to reflect the larger brains, but there is plenty of flexibility to quickly acomodate small, beneficial increases in brain size.

      (Glad to see Bruce's career taking off, by the way. I used to work down the hall from him and he's an extremely smart, creative guy and a phenomenally hard worker.)

    2. Re:Would the skulls get bigger too? by Ann+Coulter · · Score: 2, Insightful

      But still the increase in skull size can result in increased probability of death for both the infant and the mother during the birthing process. This is one of the main reasons why humans do not have astronomically large craniums. Unless there is a way nature/humans can allow for the growth of larger craniums, we will remain as smart as we are now.

  5. Frankie and Benjy by jon787 · · Score: 4, Funny

    "These creatures you call mice, you see, they are not quite as they appear. They are merely the protrusion into our dimension of vast hyperintelligent pandimensional beings. The whole business with the cheese and the squeaking is just a front."
    -- Slartibartfast, The Hitchhiker's Guide To The Galaxy

    --
    X(7): A program for managing terminal windows. See also screen(1).
  6. They should name the mouse Marvin by blamanj · · Score: 3, Funny

    Here I am, with the brain the size of human, trapped in the body of a rodent.

    I'm sure it would be quite depressing.

    (Apologies to DNA.)

    1. Re:They should name the mouse Marvin by Anonymous Coward · · Score: 4, Funny

      Here I am, with the brain the size of human, trapped in the body of a rodent.

      "And here I am, with the brain the size of a rodent, trapped in the body of a human." - George W. Bush

      They should try the gene on him first!

  7. How about... by georgewad · · Score: 2, Funny

    a beowulf cluster of uber mice

    --
    Karma: It's not just a good idea. It's the law.
    1. Re:How about... by Baikala · · Score: 2, Funny

      It would be a "beowulf cluster of Abstract Thinking uber mice", if you you allow me to embrace and extend on your post. A was about to ask if some one read the article first, but then I remember, this is slashdot.

      --
      16,777,216 comments ought to be enough for any forum!
    2. Re:How about... by georgewad · · Score: 3, Funny

      Oh, was there an article?

      --
      Karma: It's not just a good idea. It's the law.
  8. Only 15? by DynaSoar · · Score: 4, Interesting

    "Lahn found that the ASPM gene in humans has undergone 15 important mutations since we last shared a common ancestor with chimpanzees, about 5 million years ago."

    One would think that the asymmetric laterality associated with language would be one of the important "human" mutations. It's not. Chimps have the same sort of asymmetry as humans in the "language" area of the brain: 'Demonstration of a human-like asymmetry of Wernicke's brain language area homolog in chimpanzee planum temporale.' (Gannon, et al., 1998). I suspect there's going to be far more than 15 mutations required to explain things, going back much, much farther than 5 million years.

    --
    "I may be synthetic, but I'm not stupid." -- Bishop 341-B
    1. Re:Only 15? by Elwood+P+Dowd · · Score: 3, Informative

      Many asymmetric functions of the brain could be due to very general mutations:

      "Left side, build neurons with branches closer to the nucleus."

      "Right side, build neurons with branches further from the nucleus."

      Neurons on the left side of your brain are more likely to be linked to nearby neurons than the right side. Neurons on the right side of your brain are more likely to have far away links.

      Left brain semantic functions associate words like "warm" and "cold". Right brain language functions associate words like "warm" and "orange" (a warm color).

      Er, maybe that's a bad example. I wish I still had access to my college's journal subscriptions.

      Anyway. I'm sure there are genes that have given our brains specific asymmetrical capabilities, but my (limited!) understanding of the subject leads me to believe that that most asymmetrical capabilities of the brain are due to a very general difference in neuron branching.

      And all this only really makes sense in the 90% of people that are left-brain "dominant". It very nicely explains why we're more dextrous with our right hands.

      (Wait... I don't know how this relates to your comment anymore. I'm sorry :)

      --

      There are no trails. There are no trees out here.
  9. Quite simple, actually. by Rufus88 · · Score: 5, Funny

    root# diff gwbush_genome.map jdoe_genome.map

    1. Re:Quite simple, actually. by BillyBlaze · · Score: 2, Funny

      Stop playing root!

  10. Maybe far fetched but.. by tka · · Score: 2, Interesting

    ..what happens then? Mices learn to think and you kill'em as soon as you get the results?

    1. Re:Maybe far fetched but.. by Tango42 · · Score: 2, Insightful

      The mutations in primates produced us (apparently), by increasing brain size. However, primates already had fairly large brains, so a 50% increase (or whatever it is) leads to many extra brain cells. Mice have very small brains to start with, so even if they get 50% bigger they are very unlikely to become anywhere near human intelligence. However, the next logical step is to perform these experiments on chimps and try and repeat evolution. That could cause serious ethical issues.

  11. NIMH has its Secrets by HTH+NE1 · · Score: 5, Funny

    Let's just hope the experimental subjects don't look at the writing on their cages and comprehend.

    --
    Oh, say does that Star-Spangled Banner entwine / The myrtle of Venus with Bacchus's vine?
    1. Re:NIMH has its Secrets by isn't+my+name · · Score: 2

      My thoughts exactly. I loved that book as a kid.

  12. Uh oh by Chester+K · · Score: 3, Funny

    They plan to insert the gene into mice to 'to see what affect it has on brain development.

    Pinky: What are we going to do tonight?

    The Brain: Same thing we do every night... try to take over the world!

    --

    NO CARRIER
  13. Might want to look into the 2nd smartest species.. by Justin+Ames · · Score: 4, Insightful

    They may want to look at the genetic mutations of dolphins and find out what made them have such a large brain, and be so intelligent that all that they do is swim in the water, eat fish and play around, whereas we build cars and buildings, and start wars.

  14. Re:Might want to look into the 2nd smartest specie by b-baggins · · Score: 3, Insightful

    Or why human midgets can have a brain size smaller than a chimpanzee and still have a genius IQ.

    I think brain size is probably the least important determiner of human intelligence.

    --
    You can tell a great deal about the character of a man by observing those who hate him.
  15. Obligatory Amazon Spam by fm6 · · Score: 4, Interesting

    Bruce Sterling wrote a very funny story along these lines, called "Our Neural Chernobyl". In his story, the virus used to transport the genes escapes (naturally!), but doesn't actually turn out to be much of a problem for people, except for creating a few navel-gazers. (This goes with a constant theme of Sterling's, that raw intelligence is an overrated commodity.) But the fun begins when the virus jumps to other species. So you get racoons that learn to pick locks, coyotes that organize protection rackets against ranchers, etc. Collected here.

  16. Re:Devil's Advocate here. by NickFusion · · Score: 4, Funny

    Technically, I think that would make you God's Advocate, which could be an important distinction, for billing purposes.

    But yeah, race of hyper-intellegent rodents, not really getting my vote for the Bright Idea 2004 Sweepstakes.

    I imagine walking out of the house one day into a giant springloaded trapped baited with porn and the latest ATI card.

    --
    What were you expecting?
  17. Re:Devil's Advocate here. by Daniel+Dvorkin · · Score: 3, Insightful

    ... given the record of "scientists" and their truly vile and obscene pursuits throughout the ages ...

    Please be specific. Names, dates, places. With an explanation of what makes these incidents vile and obscene. Also please include a short, well-written essay on why you are willing to use the products of such a vile, obscene pursuit in your daily life rather than living in the woods and living on roots and berries.

    --
    The correlation between ignorance of statistics and using "correlation is not causation" as an argument is close to 1.
  18. Re:Devil's Advocate here. by egomaniac · · Score: 4, Insightful

    Frankly, I don't think this is funny in the least.

    The purposeful attempt to induce human-like intelligence in a lower species strikes me as one of the more vile and obscene pursuits a man of "science" [whatever that is] could possibly undertake. And, given the record of "scientists" and their truly vile and obscene pursuits throughout the ages, that's saying something.

    Frankly, it strikes me as an affront against God.


    "Affront against God" is one of those meaningless, yet highly emotionally charged, statements that can apply to almost anything.

    First: I presume by "God" you are referring to the Christian God. Not everyone is Christian. Chances are that you would be offended if a Hindu person tried to shut down our scientific pursuits by declaring them "an affront against Vishnu", or tried to stop you from eating beef owing to the cow's status as a sacred animal. Why should a non-Christian care whether or not the Christian God is affronted?

    Second: How do you know that the Christian God would be affronted in the first place? The Bible, to the best of my knowledge, does not tell us (even indirectly) not to tinker with mouse genes in an attempt to make them smarter. Even if the Bible does contain passages that might be interpreted in this fashion, A) it's a matter of interpretation, and B) modern-day Christians already ignore huge passages of the Bible, so what's one more?

    Third: What makes this "vile and obscene"? A statement like that requires some exposition.

    --
    ZFS: because love is never having to say fsck
  19. Re:Devil's Advocate here. by Rick.C · · Score: 2, Insightful
    "If God had wanted men to fly ... we'd all be born as planes." - somebody semi-famous.

    "If God wanted mice to be smart, He'd allow us mess with their DNA." - me

    "What God wants, God gets. God help us all." - Roger Waters

    Frankly.
    --
    You were 80% angel, 10% demon. The rest was hard to explain. - Over The Rhine
    "Math in a song is good."-Linford
  20. Re:Devil's Advocate here. by cryptochrome · · Score: 2, Interesting

    I think it'd make life pretty interesting if humans had some competition once again. Maybe give species other than humans a fighting chance for controlling their own survival. I think certain corporations might think twice about razing that forest for development if they knew they'd be running into a pack of intelligent wolves. Of course, knowing humans they won't react well.

    Well, I'm off to go campaign for a constitutional amendment giving all sentient beings the vote.

    --

    ---If you can't trust a nerd, who can you trust?

  21. Re:Might want to look into the 2nd smartest specie by emaveneau · · Score: 5, Informative
    They may want to look at the genetic mutations of dolphins and find out what made them have such a large brain, and be so intelligent that all that they do is swim in the water, eat fish and play around, whereas we build cars and buildings, and start wars.
    The Swedish scientist Lars Terenius, one of the discoverers of endorphins, may have already answered that question.
    He suggested that humans might be the only species on the planet lacking enough chemicals in their brains to keep them happy.
    Just as people are tempted to drink and take drugs in search of euphoria, so too might they scale mountains, build skyscrapers or pen theories on the laws of the universe if the sense of accomplishment unleashed euphoria-producing brain chemicals. Lower species, meanwhile, would remain content to huddle in their twigs and bushes generation after generation.

    Page 143. Possessing Genius: The true account of the Bizarre Odyssey of Einstein's Brain. Carolyn Abraham, 2001, Penguin. ISBN 014029368X.
    Our disposition to be unhappy makes us out compete everything else. Other species are happy and only seek survival.

    BTW: Great book. Covers what happened to his brain post autopsy. Full of neuro knowledge and witticisms.

  22. Re:Might want to look into the 2nd smartest ... by Zugok · · Score: 2, Funny

    opposable thumbs are pointless if there are no fingers.

    --
    "I just can't sit while people are saying nonsense in a meeting without saying it's nonsense" J Watson, Sci Am 288:(4)51
  23. Take it outside God-boy by IWorkForMorons · · Score: 3, Insightful
    Not trying to troll. But seriously...there is going to be problems between science and God (or certain people's interpretation of what God has "planned") no matter what is done. In the matters of science, religion should take a back seat.

    In the early days (and some today), people saw vaccines as tools of the devil because they were not natural or God-given. But vaccines have proven themselves as a strong tool against deadly diseases. And it's due to the doctors who persevered in the face of stronger religious ideals then today. This is another step in medicine, and the benefits that can result from it cannot be overlooked. But if most God-fearing Christians (I assume you're refering to the Christian God) would like to have work like this stopped, because it's an "affront against God". It's not an affront against God. It's science. It's research. It's tinkering with this, seeing the result, and wondering if it can be applied to that. It's trying to benefit that human race. The only thing that can interfere with that is people saying "You shouldn't do that because you might piss off the invisible man in the sky!" Sorry, I don't mean to offend anyone. But that argument has been used too many times to prevent legitimate research. It's being used now to prevent stem-cell research. And that's something that I and many other people are really looking towards, because of certain genetic risks that I and my family are exposed to right now. I'd like to know that, in the event that these risks become reality, someone has worked out all the problems and can treat me. Because as it stands now...if I am ever diagnosed with the same illness as my mother, I would suffer the same fate as her. And that's something I would NEVER want to put my kids through...

    Don't fear what the invisible man in the sky *MIGHT* think. If he is up there, chances are you will probably misinterpret his meaning anyways. Just look at the "My God can beat up your God" BS happening in the world right now to see evidence of that. Instead...fear the things you know for sure exist in the world...

  24. NIMH by Space · · Score: 2, Interesting

    as in the rats of?

    --
    I Don't Work Here
  25. a new race of super-dogs by glassesmonkey · · Score: 2, Interesting

    Why doesn't some of the more contraversial scientists (human-cloning, clone-of-clone cloners, Clone-Aid wackos) take some other mammals (dogs or chimpanzees) and re-create these dozen or so mutations?!

    The implication are staggering. Now that people are buying glow-in-the-dark fish I would really think there would be a market for these mutants. I just hope they don't start with mice, rats, or squirrels.

  26. I agree somewhat -- ethical considerations by cpu_fusion · · Score: 3, Insightful
    As an individual who is very intrigued by scientific discoveries, my gut instinct is to say "cool! Let's try it out!"

    As a Christian who believes in the sanctity of human life while not necessarily the sanctity of mouse life (please understand, I'm not trolling here), this raises concerns for me.

    Let me start off by saying that I feel that there is something spiritually unique that comes with our human mind in terms of persistent experience through a long term memory, inter-generational passing of memes through language, and a higher-order basis for desire and suffering.

    Once we pass this experience, some may call it a curse or a blessing, (I prefer the latter), on to animals, we are entering a new role of responsibility as a Creator. I think this sort of science is as inevitable as the nuclear bomb, and don't get me wrong -- I'd rather see it in the hands first of (aproaching-)democractic states, but we have to tread cautiously in my opinion.

    Consider, where will this take us? Slave animals to fight our wars, clean our toilets, and tickle our fancy? Or a "brotherhood" (sisterhood if you prefer) of species working towards a better world? Probably both, but most likely, in my opinion, the former. As silly as it was, Planet of the Apes did raise some important concerns, as have many other works of science fiction. (Cue Charleton Heston shouting "it's a madhouse!")

    I'm not saying that splicing those genes into a mouse is going to produce "human-mice" that we need to hire lawyers for to defend themselves against medical treatment, (although lawyers once again seem poised to score big bucks), but at what threshold do we create something which deserves fundamental human rights? (Cue Picard and Data in that STNG episode.)

    Science is moving so fast that our understanding of the larger ethical questions is struggling to keep up. I urge you as you feel excitement about developments like this to look inside your own moral compass, whatever faith or wisdom molded your clay, and look for answers and new questions.

    May the Creator guide our hands wisely, and may we please his aesthetic sense.

    1. Re:I agree somewhat -- ethical considerations by Anonymous Coward · · Score: 4, Insightful
      ...we are entering a new role of responsibility as a Creator. ...

      ...Consider, where will this take us? Slave animals to fight our wars, clean our toilets, and tickle our fancy? ...

      Nah. Let's do it right. First we'll make them curious, then punish them for it. Then, after several generations of inbreeding, we'll raze one of their cities to make an example. After that, we'll say to hell with it, and kill all but two of them, but give them some shiny things in return. After few more generations of inbreeding, we'll micromanage their goverments with plauges and killing sprees. Then we'll command them to worship us, and, oh yeah, to not be evil. Finally, we'll give them conflicting accounts of our existance, tell them to kill the nonbelievers, and let them fight it out.

  27. Re:Might want to look into the 2nd smartest specie by Ray+Radlein · · Score: 2, Insightful

    Only a Scandanavian scientist would come up with the theory that melancholy gloom and existential despair are what makes humans great.

  28. Questions I am asking myself by cpu_fusion · · Score: 3, Interesting
    If we splice the genes into a human to give us characteristics of animals, would we call the result a human?

    What if we give ourselves hooves? Wings? Erase the capacity for language? At what point do "human rights" cease to apply?

    If we splice the genes of a human into an animal, would we call the result a human?

    What if we give it human-like limbs, a human heart, or a human mind? At what point do "human rights" begin to apply?

    Interesting times are ahead of us my friends, and that can be considered a curse.

    (By animal, I'm thinking non-human, and I realize that is a rather debatable definition.)

  29. They've already done something similar to this by cpu_fusion · · Score: 4, Funny

    Word is, they've spliced human brain capacity into snakes, 800-pound gorillas, and dinosaurs.

    1. Re:They've already done something similar to this by Hektor_Troy · · Score: 2, Insightful

      You've got it the wrong way around ...

      They've spliced snake brain capacity, 800-pound gorilla brain capacity, and dinosaurs brain capacity into humans.

      --
      We do not live in the 21st century. We live in the 20 second century.
  30. David Brin was ahead of his time... by Orne · · Score: 2, Insightful

    I'm surprised noone's made any comments how this resembles the background of David Brin's "Uplift" saga... that humankind cracks the secret of intelligence through genetics, and passes the gift on to his fellow species.

    What gets me is, once we realize that we *can* make our fellow creatures intelligent (or should I say, self-aware), then what? It is ethically immoral (to me) to then kill them, yet it is unfair to the self-aware critter to say "we were only doing this to see if we could, you're the last, sorry".

    Oh well, I gotta get back to work.

  31. Yay by darllikesdong · · Score: 2, Funny

    Can't wait till I start seeing this in my inbox: Enlarge your brain! 100% natural. Safe and effective!