Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Sound travels about 4 times faster in water than in air.
408
German chemists made a replica of a trophy the size of one molecule.
68
For every gallon of sea water, you get more than a quarter pound of salt.
45
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
One cubic foot of gold weighs more than 1,200 pounds!
78
Most dust particles in your house come from dead skin.
48