The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Most dust particles in your house are made from dead skin!
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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In zero gravity, a candle's flame is round and blue.
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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