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 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 ...

Laughter feels deeply human. It appears in conversations, family gatherings, awkward moments and bursts of joy. Yet the roots of that familiar sound stretch much further back than human history itself ...

“Man is distinguished from all other creatures by his faculty of laughter,” wrote the English essayist Joseph Addison in 1712. Modern science has a different take – up to a point. We’re pretty sure ...