There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
In zero gravity, a candle's flame is round and blue.
16
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Scientists aren't sure what color dinosaurs were.
312
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Sound at the right vibration can bore holes through a solid object.
134