The human brain is more active during sleep than during the day.
28
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 human being loses an average of 40 to 100 strands of hair a day.
133
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
On average a woman has 4 sexual partners in her lifetime.
-143
If your DNA was stretched out it would reach to the moon 6,000 times.
256
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82