A cubic yard of air weighs about 2 pounds at sea level.
31
Hot water can freeze faster than cold water.
181
One third of the electricity produced on earth is used to power electric light bulbs!
75
Your brain is 80% water.
525
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Pumice is the only rock that floats on water.
14