The bark of an older redwood tree is fireproof.
65
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Hot water can freeze faster than cold water.
181
One barrel of petroleum holds 42 gallons.
20
Scientists in Germany have developed a candy that doesn't cause cavities.
11
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55