Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
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A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Pure water (H2O) does not conduct electricity on its own.
46
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
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