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 world's shortest man measures only 21.5 inches.
73
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The average sperm cell swims at 8 inches per hour.
4
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
