The cat brain weighs about 30g.
The adult human brain weighs about 3 pounds (1,300-1,400 g).
By weight, Bone is five times stronger than steel.
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
You burn 26 calories in a one minute kiss.
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.