One human hair can support 3 ounces.
191
A hummingbird weighs less than a penny.
1k
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
You burn more calories sleeping than you do watching television.
348
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The elephant brain weighs about 6,000g.
274
The average person's skin weighs twice as much as their brain.
131