By weight, Bone is five times stronger than steel.
417
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
The human eye blinks an average of 4,200,000 times a year.
233