The Earth's atmosphere weighs about 5.5 quadrillion tons.
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The only letter not appearing on the Periodic Table is the letter "J".
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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
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Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
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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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4.5 pounds of sunlight strike the Earth each day.
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