Your fingernails grow faster in summer.
744
If your DNA was stretched out it would reach to the moon 6,000 times.
256
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
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
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
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
Enamel is hardest substance in the human body.
61