Indoor pollution is 10 times more toxic than outdoor pollution.
62
The force of a suction cup is calculated using F=AP.
15
The average temperature at 40,000 feet above sea level is -60 F.
56
For every gallon of sea water, you get more than a quarter pound of salt.
45
One ragweed plant can release as many as one billion grains of pollen!
51
4.5 pounds of sunlight strike the Earth each day.
27
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The only letter not appearing on the Periodic Table is the letter "J".
180