Web Results

en.wikipedia.org/wiki/Yawn

A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the ... In humans, yawning is often triggered by others yawning (e.g. seeing a ... reduced contagious yawning when watching videos of people yawning.

www.webmd.com/brain/news/20110923/why-we-yawn

Sep 23, 2011 ... All humans yawn. So do most vertebrate animals. Surely it serves some useful function. But what that might be has puzzled scientists ...

www.huffingtonpost.com/2013/06/10/facts-yawning-why-we-yawn-contagious_n_3398301.html

Jun 10, 2013 ... The study found that people were more likely to yawn during the winter, when the exterior air is obviously cooler, than in the summer, when ...

www.healthline.com/health/why-do-we-yawn

Mar 27, 2017 ... There are many theories as to why people yawn. One popular theory is that yawning helps your body bring in more oxygen. But this theory has ...

articles.mercola.com/sites/articles/archive/2017/07/29/yawning.aspx

Jul 29, 2017 ... What we do know is that all humans and most animals yawn for one reason or another. One popular theory behind yawning is related to the ...

www.loc.gov/rr/scitech/mysteries/yawn.html

The act of yawning (oscitation) occurs in almost all vertebrates- even birds and fish exhibit a form of mouth gaping similar to yawning. In humans, yawning can ...

time.com/4801522/is-yawning-contagious

Jun 8, 2017 ... If seeing someone mid-yawn makes you involuntarily stretch out your mouth, you' re not alone. In fact, you're among the 60-70% of people who ...

science.howstuffworks.com/life/inside-the-mind/human-brain/question572.htm

Next time you're in a meeting, try this little experiment: Take a big yawn, cover your mouth out of courtesy and watch to see how many people follow suit. There's ...

www.smithsonianmag.com/science-nature/why-do-we-yawn-and-why-is-it-contagious-3749674

Jun 28, 2013 ... Humans yawn from their earliest days–even babies still inside the womb can yawn. Photo by Flickr user Björn Rixman. Snakes and fish do it.