When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The world's shortest man measures only 21.5 inches.
73
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
218
A person can live without food for about a month, but only about a week without water.
156
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515