The human brain is more active during sleep than during the day.
28
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
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
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
On average, there's 100 billion neurons in the human brain.
83
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198