Why do we yawn? Most vertebrates, including humans, yawn or exhibit similar behaviors. Spotted hyenas, which live in groups, ...

Yawning isn’t the only bodily function that’s contagious. Japanese scientists have discovered that chimpanzees are more likely to urinate when they see other primates going No. 1 as well, as detailed ...

Contagious yawning is a widespread phenomenon that extends beyond merely being a sign of drowsiness; it is a behaviour interwoven with both physiological regulation and social communication. Recent ...

Researchers believe the yawning robot may have triggered some biological mechanism in the chimps that they associated with sleep. Image: Popular Science composite, Getty Images/ RMJM, Aline ...

If you’ve ever caught yourself yawning after someone else does, you’re not alone; apparently, dogs aren’t immune either. In a new video posted by @aaronhidock, we get front-row seats to a hilarious ...