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.
1k
The elephant brain weighs about 6,000g.
274
Sex burns about 360 calories per hour.
860
Dieters who sleep more take off more fat that those who sleep less.
159
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The Main Library at Indiana University sinks over an inch every year because when it was built, engineers failed to take into account the weight of all the books that would occupy the building.
240
The earth is approx. 6,588,000,000,000,000,000 tons.
175