Laughter means the same thing in the U.S. as it does in India, Australia, Russia, and everywhere else on earth. In fact, it's not even a distinctly human trait—apes chuckle too.

But all laughter isn't created equal. Laughter (and other vocal expressions) used to be more closely tied to how we feel, but as we evolved, we learned to fake it in order to speed up the bonding process. However researchers recently showed we can tell whether giggles are genuine or phony. A new study even suggests we're able to judge whether people are friends or strangers based on how they laugh around each other.

(h/t The Conversation)

READ THIS NEXT: Why "Living in the Moment" Is Bad Advice
 

Take on too much in the New Year?

We'll make crushing your goals a whole lot easier by sending you a healthyish idea you can do every day.
Sign up to get healthy ideas
via Facebook Messenger
 
CLOSE

Sign up for a daily healthyish text message

Status Available in the U.S. and Canada only. Clicking "SIGN UP" means you would like to receive text messages from Greatist. Msg & Data rate many apply. Text STOP to cancel or HELP for help.