Chimps may revise their beliefs in surprisingly human-like ways. Experiments showed they switched choices when presented with stronger clues, demonstrating flexible reasoning. Computational modeling ...

Chimpanzees have long fascinated researchers, not only for their unique behaviors, but also for how they are similar or (not) to humans. What’s been particularly interesting to field researchers is ...

A new study has the clearest evidence yet that territorial expansion after lethal conflict can directly boost reproductive ...

The government started breeding chimpanzees for invasive biomedical research in the 1980s — and now, the fate of more than 250 of these primates is uncertain. In 1995, the government stopped breeding ...

This past March, the Human Society of the United States filed an accusation against one of the leading nonhuman primate research facilities in the country, claiming it had systematically bred ...

A chimpanzee doesn’t hesitate to make it clear when it wants attention. The closest cousin of humans, this species of great ape has effective ways of communicating what it needs. Researchers have ...

In early 2001, when the first draft of the human genome sequence was released by the National Institute of Health and Celera Genomics, the moment was heralded rightly as a new dawn for modern medicine ...