A ball of glass will bounce higher than a ball made of rubber.
73
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
One barrel of petroleum holds 42 gallons.
20
Your brain is 80% water.
525
Iron weighs more after it rusts.
16
For every gallon of sea water, you get more than a quarter pound of salt.
45
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7