The Earth's atmosphere weighs about 5.5 quadrillion tons.
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The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One barrel of petroleum holds 42 gallons.
20
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20
For every gallon of sea water, you get more than a quarter pound of salt.
45