The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
A million dollars weighs about a metric ton. Hence the expression "a ton of money."
66
By weight, Bone is five times stronger than steel.
417
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
Fidgeting can burn about 350 calories a day.
201
