Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
One third of the electricity produced on earth is used to power electric light bulbs!
75
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Sound at the right vibration can bore holes through a solid object.
134
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
In zero gravity, a candle's flame is round and blue.
16