The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Most dust particles in your house are made from dead skin!
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A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Aluminum used to be more valuable than gold!
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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