If this is borne out with further study, it will help answer some questions about what makes a human a human, and not a chimp.
http://news.yahoo.com/s/ap/20060816/ap_on_sc/brain_evolution
WASHINGTON - Scientists believe they have found a key gene that helped the human brain evolve from our chimp-like ancestors. In just a few million years, one area of the human genome seems to have evolved about 70 times faster than the rest of our genetic code. It appears to have a role in a rapid tripling of the size of the brain's crucial cerebral cortex, according to an article published Thursday in the journal Nature.
™ Version 4.2