Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Dolphins are among the most playful and social animals on Earth, yet ...

Laughter’s evolutionary story may be written on chimpanzees’ faces. Chimps at play make open-mouth facial expressions while either laughing out loud or staying silent, say psychologist Marina ...

Dolphins are extremely playful, but little is known about how they—and other marine mammals—communicate during playtime. New research publishing October 2 in the Cell Press journal iScience shows that ...