The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
A cesium atom in an atomic clock beats over nine billion times a second.
43
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The smell of freshly cut grass is actually a plant distress call.
31
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310