Ena Onishi, a doctoral program student with the Kyoto University graduate school, was in charge of observing the chimps in the latest study. Over a period of 604 hours, Onishi and her colleagues ...

National Geographic assigned Hugo to document chimp behaviors but also to film and photograph what they called “human interest”—Jane playing with the chimps and even washing her hair.

Over six years, the researchers from Kyoto University and Akita Prefectural University analyzed the records of how the six chimps tackled three numerical tasks of different degrees of difficulty ...

"It is the first time she was outdoors with more than 10 feet of fence around her on all sides from top to bottom," said Dan Mathews with Save The Chimps Kimberlee Speakman is a digital writer at ...