By weight, Bone is five times stronger than steel.
417
The elephant brain weighs about 6,000g.
274
You burn 26 calories in a one minute kiss.
605
Most elephants weigh less than a blue whale's tongue.
442
Fidgeting can burn about 350 calories a day.
201
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
A hummingbird weighs less than a penny.
1k
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99