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
The average person's skin weighs twice as much as their brain.
131
You burn 26 calories in a one minute kiss.
605
The elephant brain weighs about 6,000g.
274
Most elephants weigh less than a blue whale's tongue.
442
A hummingbird weighs less than a penny.
1k