An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The average sperm cell swims at 8 inches per hour.
4
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
By weight, Bone is five times stronger than steel.
417
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Your thumb is about the same size as your nose.
124