Iron weighs more after it rusts.
16
4.5 pounds of sunlight strike the Earth each day.
27
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Sound travels about 4 times faster in water than in air.
408
All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
51
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7