R. Allen Gardner, 91, Dies; Taught Sign Language to a Chimp Named Washoe

He and his wife and collaborator made headlines with their finding that they could communicate with a young ape using the language of the deaf.

How Humans Lost Their Tails

A new study suggests that a single genetic mutation helps explain why monkeys have tails, while apes and people do not.

Facebook Apologizes After A.I. Puts ‘Primates’ Label on Video of Black Men

Facebook called it “an unacceptable error.” The company has struggled with other issues related to race.