When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Only humans shed emotional tears.
331
The human brain uses approximately as much energy as a 10 watt light bulb.
120
It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
218
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
You can't tickle yourself.
29
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The average sperm cell swims at 8 inches per hour.
4