Because I want to push Ms Knightley off the top of the page

 


New genetic evidence suggests that the most recent male common ancestor of all men (down the male line) is twice as old as we thought. A DNA sample from a deceased African-American was recently submitted for genetic analysis. Astonishingly, his Y chromosome was found to be completely unlike any other that's been analyzed so far - so different that when it's included, his DNA pushes Y chromosome Adam back to 340,000 years ago. That is actually BEFORE anatomically modern humans evolved.

Taken from I Fucking Love Science