By weight, Bone is five times stronger than steel.
417
Dieters who sleep more take off more fat that those who sleep less.
159
One human hair can support 3 ounces.
191
Sex burns about 360 calories per hour.
860
Most elephants weigh less than a blue whale's tongue.
442
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
A hummingbird weighs less than a penny.
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