A hummingbird weighs less than a penny.
1k
The earth is approx. 6,588,000,000,000,000,000 tons.
175
One human hair can support 3 ounces.
191
You burn more calories sleeping than you do watching television.
348
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
By weight, Bone is five times stronger than steel.
417
Fidgeting can burn about 350 calories a day.
201
The cat brain weighs about 30g.
167