By weight, Bone is five times stronger than steel.
417
Sex burns about 360 calories per hour.
860
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
You burn 26 calories in a one minute kiss.
605
The average person's skin weighs twice as much as their brain.
131
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Most elephants weigh less than a blue whale's tongue.
442