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
Early American humans hunted car-size armadillos and used their shells for houses.
12
It takes about 20 seconds for a red blood cell to circle the whole body.
102
On average, there's 100 billion neurons in the human brain.
83
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92