Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
A man's beard grows fastest when he anticipates sex.
239
On average a woman has 4 sexual partners in her lifetime.
-143
Yawns are more contagious among people with closer relationships.
163
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Tigers can see 6 times better at night than humans.
305
One human hair can support 3 ounces.
191
The human brain has the capacity to store everything that you experience.
4k