If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
A cubic yard of air weighs about 2 pounds at sea level.
31
Most dust particles in your house are made from dead skin!
67
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21