By weight, Bone is five times stronger than steel.
417
Sex burns about 360 calories per hour.
860
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The elephant brain weighs about 6,000g.
274
A hummingbird weighs less than a penny.
1k
You burn more calories sleeping than you do watching television.
348
Dieters who sleep more take off more fat that those who sleep less.
159
One human hair can support 3 ounces.
191