A cubic yard of air weighs about 2 pounds at sea level.
31
Sound at the right vibration can bore holes through a solid object.
134
For every gallon of sea water, you get more than a quarter pound of salt.
45
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
One cubic foot of gold weighs more than 1,200 pounds!
78
The bark of an older redwood tree is fireproof.
65
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Scientists in Germany have developed a candy that doesn't cause cavities.
11