By weight, Bone is five times stronger than steel.
417
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
If the human eye was a digital camera, it would have 576 megapixels.
25
The average sperm cell swims at 8 inches per hour.
4
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
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
It takes about 20 seconds for a red blood cell to circle the whole body.
102