The first is the “chimp” system – so called because we share it with our hominid cousins. This part of our brain is in play when we act impulsively, without regard for the consequences.

They looked up and saw a perplexed adult chimp peering down. When wild chimps encounter humans, they typically flee in panic—understandable given that the relationship between our two species ...

Maggie, a chimpanzee that had been at the San Francisco Zoo for over half a century, died last week after suffering from cancer. Maggie was believed to be just shy of 56 and came to the zoo in 1970, ...