Study: The human brain is still evolving: "'Our studies indicate the trend that is the defining characteristic of human evolution -- the growth of brain size and complexity -- is likely still going on,' said lead researcher Bruce Lahn, an assistant professor of human genetics.

'Meanwhile, our environment and the skills we need to survive in it are changing ... (and) I would expect the human brain, which has done well by us so far, will continue to adapt to those changes,' said Lahn. "