There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
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
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Held in farts enter your bloodstream and are bad for your body.
26