Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Iron weighs more after it rusts.
16
Most dust particles in your house are made from dead skin!
67
Balsa wood is classified as a hard wood!
41
One third of the electricity produced on earth is used to power electric light bulbs!
75
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 are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117