An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
One human hair can support 3 ounces.
191
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
You can't tickle yourself.
29
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62