Great apes and humans all laugh with a steady, even rhythm, and a new study finds it has barely changed in 15 million years.

Laughter is often called the most human sound. It carries joy, relief, connection, and sometimes even healing. For centuries, we believed that laughter belonged only to us, a special emotional ...

Laughter is an everyday reminder that we humans are animals. In fact, when recorded laughter is slowed down, listeners can’t tell whether the sound is from a person or an animal. We throw our heads ...