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Human brains getting larger, more complex
« on: 2005-09-09 08:19:36 » |
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http://www.bloomberg.com/apps/news?pid=10000087&sid=azKGXNkD4Yeg&refer=top_world_news
does it mean we are 'evolving'?
Human Brains Are Getting Larger, More Complex, Scientists Say
Sept. 9 (Bloomberg) -- Human brains are still evolving, increasing in both size and complexity, University of Chicago geneticists said in two papers published in the journal Science.
Scientists studying two genes that regulate brain size, Microcephalin and ASPM, found groups of variants, known as haplogroups, that emerged about 37,000 years ago and 5,800 years ago, according to the papers published yesterday in Science. Anatomically modern humans evolved about 200,000 years ago.
``Our studies indicate that the trend that is the defining characteristic of human evolution -- the growth of brain size and complexity -- is likely still going on,'' Bruce Lahn, lead researcher for both papers, said in an accompanying statement. ``If our species survives for another million years or so, I would imagine that the brain by then would show significant structural differences from the human brain of today.''
check the link for more
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