Yawning is considered a social behavior. While fetuses were known to yawn, scientists weren't sure if it was a self-contained ...

The human body comes with some strange quirks. Stacker reveals the explanations behind some of the weirdest reactions, like ...

Even in the womb, it seems, a yawn is hard to resist. In a small study of 38 women in their third trimester, Italian ...

Rather than catching a yawn on sight, muscles squeezing the uterus could be the trigger for a fetus to catch a yawn from its ...

If that involuntary action seems to yield a welcomed head-clearing effect, new science suggests that just might be true.

Next time you catch yourself yawning, look around: Did anyone close to you let out his or her own sleepy "ahhh"? Turns out, close friends and family are more likely than acquaintances or strangers to ...

A camera recorded the mother's face, while a 2D ultrasound machine monitored the fetus's nose and lips in real time.

When I interviewed Andrew Gallup, I yawned five times in the space of half an hour. That wasn’t because he was boring. It was because he studies yawning—and not just in humans, either. Gallup, a ...

In the 1980s, a team of psychologists interviewed members of the Philadelphia 76ers about their belief in streak shooting — the notion that a player is more likely to make another shot after making a ...