For every gallon of sea water, you get more than a quarter pound of salt.
45
In zero gravity, a candle's flame is round and blue.
16
Out of all the senses, smell is most closely linked to memory.
146
The average home creates more pollution than does the average car.
33
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Iron weighs more after it rusts.
68
One barrel of petroleum holds 42 gallons.
20