Human hair and fingernails continue to grow after death.
7
One human hair can support 3 ounces.
191
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
On average a woman has 4 sexual partners in her lifetime.
-143
On average, there's 100 billion neurons in the human brain.
83
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human brain is more active during sleep than during the day.
28