Iron weighs more after it rusts.
16
For every gallon of sea water, you get more than a quarter pound of salt.
45
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41
Sound at the right vibration can bore holes through a solid object.
134
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
A ball of glass will bounce higher than a ball made of rubber.
73
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
One third of the electricity produced on earth is used to power electric light bulbs!
75