Monkeys, apes and humans make up the primate animal grouping. Here is where we find our closest genetic relatives that exhibit familiar behaviors, including cultural practices, tool use and language acquisition. What separates primates from lower order animals, and what binds us together? Quit monkeying around and take the primate quiz to find out! See more »

Until now, no one has documented a definite case of chimpanzees using tools to hunt in the traditional sense. Find out what a new study on chimpanzees may reveal about human evolution. See more »

Orangutans might be the most low-key of the world's apes, but that doesn't mean they don't like to socialize. So are these redheads miscast as loners, or are orangutans introverts? See more »

Besides our genetic similarities, gorillas also share our love of getting a good night's sleep -- except that their alarm clocks come in the form of dangerous predators and poachers. See more »

A long, long time ago, lemurs lived all over the world. But something happened to kill them off -- everywhere except in Madagascar. How did the island protect them from extinction? See more »

Ape, any of 13 species of tailless primates. The orangutan, gorilla, chimpanzee, and pygmy chimpanzee are the largest apes and are called great apes. See more »

I'm sitting on a grassy hillside, surrounded by 20 close relatives. No, it's not a family picnic. I'm surrounded by monkeys. Learn about ape culture and conservation. See more »

Aye-aye, ', a lemur-like primate found only on Madagascar. It is up to 40 inches (1 m) long, including a 24-inch (60-cm) tail. See more »

Baboon, a large monkey that inhabits savannahs and rocky hills in Africa and southwestern Arabia. See more »

Capuchin, or Sopajou, a South American monkey. Above its eyes is a hoodlike growth of fur that resembles a monk's cowl. See more »