Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
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
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
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
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252