The human brain is more active during sleep than during the day.
28
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Pain occurs when sounds are above 130 db.
124
If the human eye was a digital camera, it would have 576 megapixels.
25
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
You can't tickle yourself.
29
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34