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
A cubic yard of air weighs about 2 pounds at sea level.
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MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
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Balsa wood is classified as a hard wood!
41
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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