Well, it may not be evolution at work, though some have jokingly called her the missing link, but this is still cool. The AP reports that a 5-year-old black macaque at a zoo outside Tel Aviv has started exclusively walking upright. Apparently she was recently very sick, nearly died, and when she recovered, she started walking upright. One guess at an explanation for the odd behavior is that she developed brain damage while sick. I think she's making a play to be in the next X-men flick myself.