An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
You can't tickle yourself.
29
The average person's skin weighs twice as much as their brain.
131
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Poor eyesight (myopia) is associated with higher IQ.
232
The human body contains over a billion miles of DNA.
147
Human hair and fingernails continue to grow after death.
7