Gorillas can catch human colds and other illnesses.
205
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
The human sigh acts as a physiological reset button.
23
Pain occurs when sounds are above 130 db.
124
Early American humans hunted car-size armadillos and used their shells for houses.
12
If your DNA was stretched out it would reach to the moon 6,000 times.
256
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515