The Mona Lisa has no eyebrows. It was the fashion in Renaissance Florence to shave them off by Unknown

When glass breaks, the cracks move faster than 3,000 miles per hour. To photograph the event, a camera must shoot at a millionth of a second! by -

It takes glass one million years to decompose, which means it never wears out and can be recycled an infinite amount of times! by Discovery channel

Most lipstick contains fish scales! by Unknown

A mole can dig a tunnel 300 feet long in just one night! by .

A cockroach can live several weeks with its head cut off - it dies from starvation! by .

you're born with 300 bones, but when you get to be an adult, you only have 206! by .

Human thigh bones are stronger than concrete! by .

Your heart beats over 100,000 times a day! by .

Speed of sound is four times faster in water than in the air. by anon