It's no secret that humans and primates share many common traits (and the vast majority of our DNA), but some monkey behaviors still leave scientists baffled. One of these behaviors was seen as ...

Two of six spider monkeys illegally brought into California are shown above with their troopmates where they are now living at Chicago's Brookfield Zoo. (U.S. Attorney's Office) A Texas man was busted ...

Howler infant number 5 on the back of a juvenile capuchin carrier, who is using stone tools at an anvil site in a stream bed. Usually, this behavior in females is described as adoption, thought to be ...

On an island in Panama, a fad that one researcher called "viscerally disturbing" has recently taken off among a group of young male monkeys. These adolescents and juveniles have started to kidnap the ...

A 39-year-old New Jersey man pleaded guilty to conspiracy to distribute animal crush videos. The videos, which were shared online, showed baby monkeys being crushed, burned, drowned, suffocated, ...

A Texas man was busted for trafficking vulnerable Mexican baby spider monkeys, who were too young to be separated from their mothers, into San Diego and selling them on Facebook. Sarmad Ghaled Dafar, ...