By weight, Bone is five times stronger than steel.
417
Most elephants weigh less than a blue whale's tongue.
442
The average person's skin weighs twice as much as their brain.
131
Dieters who sleep more take off more fat that those who sleep less.
159
The earth is approx. 6,588,000,000,000,000,000 tons.
175
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
Fidgeting can burn about 350 calories a day.
201
The elephant brain weighs about 6,000g.
274