Charla thought little of it when her friend invited her over to help with her pet chimpanzee – but saying yes resulted in her eyes being ripped out just minutes later ...

Horror emergency call as pet chimp rips off woman's face and eats her eyes. WARNING GRAPHIC CONTENT: Sandra Herold made a frantic call after her pet chimp Travis attacked her friend Charla Nash.

In the 1997 movie “Buddy,” Rene Russo plays a wealthy, eccentric collector of wild animals. Hoarder might be a more fitting description. Chimpanzees are among the animals in her possession.

Following the tests, 14 chimpanzees (57.1 percent) reportedly exhibited signs of contagious yawning. The chimps yawned more frequently when the robot’s mouth was fully agape in a yawn.

How scientists studied collective chimp urination behavior. Onishi and her team studied 20 captive chimps − 16 males and four females − who were socially acquainted with each other.

Video from 2012 showing the individual variation in nut-cracking efficiency in the Bossou chimpanzees. The first cracker is Peley, a 14-year-old adult male who successfully cracks two oil palm nuts.

All of the former research chimpanzees that had been living on an Air Force base in New Mexico have finally arrived at a sanctuary in Louisiana. Many of these chimps are in their 50s and 60s.

Why the chimps do this remains a mystery, but Ms. Onishi and her colleagues have several hypotheses. “Contagious urination might help reinforce group connections, boosting overall social ...

For wounded chimpanzees, help sometimes comes in the form of first aid — care rendered not by humans but by other chimps. New research reveals the nature and prevalence of these rarely witnessed ...