A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Balsa wood is classified as a hard wood!
41
Iron weighs more after it rusts.
68
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
For every gallon of sea water, you get more than a quarter pound of salt.
45
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65