Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Your brain is 80% water.
525
One ragweed plant can release as many as one billion grains of pollen!
51
One barrel of petroleum holds 42 gallons.
20
Sound at the right vibration can bore holes through a solid object.
134
The average home creates more pollution than does the average car.
33