A cubic yard of air weighs about 2 pounds at sea level.
31
Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
1
Diamonds can be shattered with a hammer.
-104
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Pumice is the only rock that floats on water.
14
For every gallon of sea water, you get more than a quarter pound of salt.
45
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108