Yawns are more contagious among people with closer relationships.
163
We share 70% of our DNA with a slug.
218
Pain occurs when sounds are above 130 db.
124
The human sigh acts as a physiological reset button.
23
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
In one day, adult lungs move about 10,000 litres of air.
11