There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
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
Within three days of death, the enzymes that once digested your food begin to eat you.
22
There are about 1,400 different species of bacteria in your belly button.
10
There's 100 trillion good bacteria living in your body.
17
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
A person can live without food for about a month, but only about a week without water.
156