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
Sound at the right vibration can bore holes through a solid object.
134
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The sun is 330,330 times larger than the earth.
75
Sound travels about 4 times faster in water than in air.
408