Yawning can indicate boredom or tiredness.
There are many theories about why people yawn, but no one knows for sure.
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...
Sep 23, 2011 ... People yawn more easily in cooler temperatures, supporting the idea that ... 23,
2011-- Why do we yawn? ... So do most vertebrate animals.
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 ...
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
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 ...
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 ...
Jun 28, 2013 ... Platek says that yawning is contagious in about 60 to 70 percent of people—that
is, if people see photos or footage of or read about yawning, ...
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 ...
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 ...