The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
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
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Most dust particles in your house are made from dead skin!
67
A cubic yard of air weighs about 2 pounds at sea level.
31
Iron weighs more after it rusts.
68