Humans are still evolving, and here's the hard proof

Scientists have been monitoring the development of a new evolutionary change in humans. More people are being born with an "extra" artery running down their forearms. The change is likely to be present in most humans by 2100. As much as we'd like to believe that we're the end-all, be-all of the natural process of evolution, humans are far from perfect. We're obviously a lot different from our primate ancestors, but our evolutionary march is still happening, and new research reveals an adaptation...