The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
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
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The smell of freshly cut grass is actually a plant distress call.
31