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
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
The average person's skin weighs twice as much as their brain.
131
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
On average a woman has 4 sexual partners in her lifetime.
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One human hair can support 3 ounces.
191
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