When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human brain doesn't stop developing until about 25 years old.
102
A person can live without food for about a month, but only about a week without water.
156
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
If you hold farts in during the day, they'll just come out when you sleep.
16