Sound travels fifteen times faster through steel than through air.
134
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
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
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
German chemists made a replica of a trophy the size of one molecule.
68
Brass doorknobs automatically disinfect themselves in about 8 hours.
18