The adult human brain weighs about 3 pounds (1,300-1,400 g).
You burn more calories sleeping than you do watching television.
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.
The elephant brain weighs about 6,000g.
The average person's skin weighs twice as much as their brain.
The cat brain weighs about 30g.