Iron weighs more after it rusts.
16
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The average temperature at 40,000 feet above sea level is -60 F.
56
One third of the electricity produced on earth is used to power electric light bulbs!
75
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
The bark of an older redwood tree is fireproof.
65
The earth is approx. 6,588,000,000,000,000,000 tons.
175