A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
A cubic yard of air weighs about 2 pounds at sea level.
31
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
A ball of glass will bounce higher than a ball made of rubber.
73
Nylon is made from coal and petroleum.
42
One ragweed plant can release as many as one billion grains of pollen!
51