Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
A man's beard grows fastest when he anticipates sex.
239
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
A person will create enough saliva to fill two average size swimming pools during his lifetime.
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
By weight, Bone is five times stronger than steel.
417
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22