Just one-third of people can tell if you're faking that laugh

The evolution of human laughter tracks back to the monkeys in the trees, and other animals, he says — sounds that can be identified as chuckles appear in primates, and potentially other animals. (Bryant shared this about tickling rats and dolphins).

The only fakers? People.

Over the course of his research, Bryant played a series of laughing-person clips and asked subjects to pick out the fake laugh. In his study, the laughs were slowed down and sped up, to see if that made a difference.

Can you tell them apart? Hint: There’s more breath and rhythm in the real thing than the fakers.