Humans’ first experience with yawning happens in utero, says Matthew D. Epstein, M.D., associate medical director of the Atlantic Health Sleep Centers in New Jersey. Yet, Earth-side, the ...

Experts discuss the mysteries of yawning at first ever international conference. —LONDON, June 28, 2010 -- For two days last week, they came to Paris. Over two dozen experts in the field of ...

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 ...

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 ...

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 ...

Is it true that we yawn when our brains are deprived of oxygen? Most of us can feel a yawn coming on. The muscles in our jaw ...