Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human eye blinks an average of 4,200,000 times a year.
233
Poor eyesight (myopia) is associated with higher IQ.
232
The average sperm cell swims at 8 inches per hour.
4
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
Tigers can see 6 times better at night than humans.
305
One human hair can support 3 ounces.
191