For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
A person can live without food for about a month, but only about a week without water.
156
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Only humans shed emotional tears.
331
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
A man's beard grows fastest when he anticipates sex.
239