Australopithecus were a primate from Africa in the Pliocene. The were one of the first apes to walk upright on two legs and were direct ancestors to Modern-day Humans, Neanderthals and other early Humans/apes.
3 million years ago in Ethiopia, Andy was with a group of Australopithecus when suddenly they were attacked by a Dinofelis. The apes retreated into a tree and then scared the big cat away by throwing stones at it. Andy then bonded with the group by grooming on of the apes. (APA: Australopithecus and Hair)