Register for an account


Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.


Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

Planet Earth

Chimps Catch Contagious Yawns From Cartoons

80beatsBy Eliza StricklandSeptember 10, 2009 12:54 AM


Sign up for our email newsletter for the latest science news

Yawning is so contagious that even chimpanzees who watched animations of cartoon chimps yawning couldn't resist the impulse, according to a new study in Proceedings of the Royal Society B. Study coauthor Matthew Campbell

doesn't think the chimps were "fooled" by the animations into thinking they were looking at real chimps, he explained that there was evidence that chimpanzees "process animated faces the same way they process photographs of faces". He said: "It's not a real chimpanzee, but it kind of looks like a chimpanzee, and they're responding to that" [BBC News].

The chimps were tested by first showing them animated chimps making a variety of facial expressions, and then another set of cartoons with yawning chimps. Only the latter cartoons elicited the yawning response. Campbell says the findings could assist

in the future study of empathy.... "We're interested in using animation for presenting stimuli to animals, because we can control all the features of what we show them" [BBC News].

As for why yawns are so contagious, Campbell suggests that the phenomenon

may have evolved to allow some animals "to coordinate activity better, resting when other individuals are resting" in order that they "can travel when it's time to travel, eat when it's time to eat" [Discovery News].

Related Content: 80beats: Scientists Tickle Apes & Conclude Laughter Is at Least 10 Million Years Old 80beats: Male Chimpanzees Share Meat in Return for Sex 80beats: Chimp Gathers Stones for “Premeditated” Attacks on Zoo VisitorsImage: J. Devyn Carter. Still frames from the animated yawning.

3 Free Articles Left

Want it all? Get unlimited access when you subscribe.


Already a subscriber? Register or Log In

Want unlimited access?

Subscribe today and save 70%


Already a subscriber? Register or Log In