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Yawn

en.wikipedia.org/wiki/Yawn

A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the .... A 2007 study found that young children with autism spectrum disorders do not increase their yawning...

Why We Yawn - WebMD

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

People yawn more easily in cooler temperatures, supporting the idea that yawning cools the brain. ... Sept. 23, 2011-- Why do we yawn? All humans yawn.

What makes us yawn? | HowStuffWorks

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

Why do people blush? Why are humans altruistic? ... Now that we know what a yawn is, let's look at what causes us to do it. On the next page, we'll discuss four ...

Excessive Yawning and What You Can Do About It - Healthline

www.healthline.com/symptom/excessive-yawning

Feb 29, 2016 ... Learn about possible causes and treatments for excessive yawning. ... Obesity is an epidemic in the U.S. This condition puts people at a higher ...

The Surprising Science of Yawning - The New Yorker

www.newyorker.com/science/maria-konnikova/the-surprising-science-of-yawning

Apr 14, 2014 ... Yawning is one of the first things we learn to do. ... the eighties and nineties, Provine demonstrated that people report yawning more frequently ...

Why do we yawn? Nothing to do with boredom - we're just cooling ...

www.independent.co.uk/news/science/why-do-we-yawn-nothing-to-do-with-boredom-were-just-cooling-our-brains-say-scientists-9356468.html

May 12, 2014 ... A new study has suggested that the reason we yawn has nothing to do ... a video of people yawning were 41 per cent likely to yawn themselves ...

Why Do We Yawn and Why Is It Contagious? | Science | Smithsonian

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

Jun 28, 2013 ... In a 2007 study, Gallup found that holding hot or cold packs to the forehead influenced how often people yawned when they saw videos of ...

BBC - Future - One of science's most baffling questions? Why we yawn

www.bbc.com/future/story/20140811-warning-this-may-make-you-yawn

Aug 12, 2014 ... If that were true, you would expect people to yawn more or less ... Yet we also yawn during times of stress: Olympic athletes often do it before a ...

Why Do You Yawn When You're Not Sleepy? | Psychology Today

www.psychologytoday.com/blog/brain-sense/201111/why-do-you-yawn-when-youre-not-sleepy

Nov 16, 2011 ... Despite what you may have heard, yawning has nothing to do with ... why some people are more susceptible to contagious yawning than ...

8 reasons for excessive yawning you probably didn't know about ...

www.thehealthsite.com/diseases-conditions/reasons-for-excessive-yawning-p915/

Sep 6, 2015 ... We don't always yawn only when we are tired, it may be due to bigger ... While the exact mechanism of why we do this is yet unknown, yawning when you ... The study also stated that people suffering from multiple sclerosis ...

Answer
Yawning can indicate boredom or tiredness.
There are many theories about why people yawn, but no one knows for sure.
More Info

Facts About Yawning: Why We Do It, Why It's Contagious And More

www.huffingtonpost.com

Jun 10, 2013 ... We all do it, and we all know it has at least something to do with how tired ... The study found that people were more likely to yawn during the ...

Why Do I Yawn? - KidsHealth

kidshealth.org

Everybody yawns — from unborn babies to the oldest great-grandparent. Animals do it, too. But why, exactly, do people and animals yawn? No one knows for ...

The Real Reason We Yawn - WSJ

www.wsj.com

Aug 19, 2014 ... Yawning tends to occur more in summer. Most people yawn upon seeing someone else do it, but infants and people with autism or ...