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
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Pumice is the only rock that floats on water.
14
Cold water weighs more than hot water.
93
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
The earth is approx. 6,588,000,000,000,000,000 tons.
175
In zero gravity, a candle's flame is round and blue.
16