Iron weighs more after it rusts.
16
The sun is 330,330 times larger than the earth.
75
The force of a suction cup is calculated using F=AP.
15
Balsa wood is classified as a hard wood!
41
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Nylon is made from coal and petroleum.
42
Your brain is 80% water.
525
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