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 force of a suction cup is calculated using F=AP.
15
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
For every gallon of sea water, you get more than a quarter pound of salt.
45
Nearly 50% of the world's scientists are assigned to military projects.
71
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Aluminum used to be more valuable than gold!
84