Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
One cubic foot of gold weighs more than 1,200 pounds!
78
The average temperature at 40,000 feet above sea level is -60 F.
56
A cubic yard of air weighs about 2 pounds at sea level.
31
A cesium atom in an atomic clock beats over nine billion times a second.
43
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57