Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
No matter how cold it gets, gasoline will not freeze.
107
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Iron weighs more after it rusts.
68
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
One cubic foot of gold weighs more than 1,200 pounds!
78