The earth is approx. 6,588,000,000,000,000,000 tons.
175
One cubic foot of gold weighs more than 1,200 pounds!
78
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Nylon is made from coal and petroleum.
42
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
The storage capacity of human brain exceeds 4 Terrabytes.
140
One barrel of petroleum holds 42 gallons.
20