The average person's skin weighs twice as much as their brain.
131
The human body contains over a billion miles of DNA.
147
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Pain occurs when sounds are above 130 db.
123
Yawns are more contagious among people with closer relationships.
163
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.
35