The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
For every gallon of sea water, you get more than a quarter pound of salt.
45
The average home creates more pollution than does the average car.
33
Iron weighs more after it rusts.
16
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
One ragweed plant can release as many as one billion grains of pollen!
51
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57