A 45,500-year-old warty pig drawing is the oldest known cave painting of an animal on record. The piggies were painted in Indonesian caves.

“They actually have two paintings in the art exhibition,” says Shockley. “One is kind of colorful and exhibits the chaos that is giant otters, and the other one is more Amazonian tone, so we have a ...

But what about all those animals that aren't primates? How can species that lack hands perform this tender act of self-love? Think of the whales and the turtles. Here are seven animals that ...