Scientists tickled monkeys to find if they have the same giggles as humans — and they do

Humans and great apes have been giggling in similar ways since branching off the evolutionary tree, a new study suggests.

How do we know this? Researchers tickled 13 captive apes — including gorillas, orangutans, chimpanzees and bonobos — and recorded the results. The new research reexamined those decades-old recordings and compared them with the newly captured giggles of four young children while they were being tickled and playing at home.

It turns out that the chuckles of humans and great apes follow similar rhythms, with regular timing between their laughs, a uniting thread that likely reflects their ties to a common ancestor, researchers said.

“In a way, we are very similar to other great apes because we’ve been laughing in a similar way for 15 million years,” said study author Chiara De Gregorio, a primatologist at the University of Warwick in England.

Laughter communicates a playful, h...