It's a titi! New monkey species found in Peru

For nearly a century the carcass of a small, reddish-brown monkey from South America gathered dust in a windowless backroom of the American Natural History Museum in New York City.

Scientists pinpoint jealousy in the monogamous mind

Jealousy leads to increased brain activity in areas associated with social pain and pair bonding in monogamous monkeys, finds a study published today in open-access journal Frontiers in Ecology and Evolution. The study is ...