Ancient and healthy: The science of laughter
Written by Tim Newman
Published: Wednesday 18 January 2017
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We all laugh. Some may laugh more than others, but it is a unanimous human trait. It feels good and brings people together. Really, laughter needs no introduction, but what is it for?
[Monkey laughing]
Laughter is a trait that we share with our distant cousins.
We laugh at jokes (albeit not all jokes). We can also laugh sarcastically, nervously, when we are stressed, or even for no reason at all.
Our laughter may be uncontrollable or maniacal, and it might also be forced, faked, or purposefully prolonged.
The laugh is so pervasive that it can hardly be ignored by scientists; it crosses all boundaries. Humans from every culture on earth laugh. Babies who are blind and deaf, having neither seen someone laugh nor heard the sound of laughter, still laugh.
http://www.medicalnewstoday.com/articles/315290.php
