Hot water can freeze faster than cold water.
181
Iron weighs more after it rusts.
16
One third of the electricity produced on earth is used to power electric light bulbs!
75
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
Each day, up to 150 species of life become extinct.
-23
The average home creates more pollution than does the average car.
33