A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The bark of an older redwood tree is fireproof.
65
Scientists in Germany have developed a candy that doesn't cause cavities.
11
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
A cubic yard of air weighs about 2 pounds at sea level.
31