Most dust particles in your house come from dead skin.
48
Pure water (H2O) does not conduct electricity on its own.
46
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
A ball of glass will bounce higher than a ball made of rubber.
73
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0