Scientists aren't sure what color dinosaurs were.
312
Pumice is the only rock that floats on water.
14
One barrel of petroleum holds 42 gallons.
20
The bark of an older redwood tree is fireproof.
65
Scientists in Germany have developed a candy that doesn't cause cavities.
11
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57