Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Most dust particles in your house are made from dead skin!
67
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
The only letter not appearing on the Periodic Table is the letter "J".
180
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5