When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
The sun is 330,330 times larger than the earth.
75
In zero gravity, a candle's flame is round and blue.
16
One cubic foot of gold weighs more than 1,200 pounds!
78