Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
You can't tickle yourself.
29
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Poor eyesight (myopia) is associated with higher IQ.
232
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
Your fingernails grow faster in summer.
744
A person can live without food for about a month, but only about a week without water.
156