Not only does Mary the Asian elephant prefer to shower herself, but she's really good at it. So good, in fact, that her dexterous bath-time ritual is the subject of a new study about animal tool use.

Elephants are highly intelligent, social creatures capable of peeling bananas, burying and mourning their dead, solving problems and greeting their companions. Now, scientists have added another skill to this list: using hoses to keep themselves clean—and,