Sex burns about 360 calories per hour.
860
A hummingbird weighs less than a penny.
1k
By weight, Bone is five times stronger than steel.
417
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 cat brain weighs about 30g.
167
Dieters who sleep more take off more fat that those who sleep less.
159
You burn more calories sleeping than you do watching television.
348
The earth is approx. 6,588,000,000,000,000,000 tons.
175