Remember those old Tarzan movies where Tarzan would yell for the elephants when he was in danger?

The elephants really did understand Tarzan.  According to a recent study elephants can distinguish between human languages, and they can tell whether a voice comes from a male, female, or a boy.

The study also shows that while humans are studying elephants the elephants are also studying people and drawing on their famed powers of memory. Read the study here