Babies, dogs, cats, birds, mice, rats and even snakes yawn, and some of us were even doing it in the womb. Although for thousands of years the reason has remained elusive, recent scholarship may have uncovered the truth as to why we yawn.
via Gizmodo http://ift.tt/1tNbuaC http://ift.tt/1o5GCyN
No comments:
Post a Comment