Iron weighs more after it rusts.
16
4.5 pounds of sunlight strike the Earth each day.
27
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
One third of the electricity produced on earth is used to power electric light bulbs!
75
The storage capacity of human brain exceeds 4 Terrabytes.
140
A cubic yard of air weighs about 2 pounds at sea level.
31
The bark of an older redwood tree is fireproof.
65
The average temperature at 40,000 feet above sea level is -60 F.
56