The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Balsa wood is classified as a hard wood!
41
Most dust particles in your house come from dead skin.
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Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
German chemists made a replica of a trophy the size of one molecule.
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