The average human carries about 200 different viruses, most entirely harmless.
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The Earth's atmosphere gradually thins into outer space.
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The Stanford marshmallow experiment studied delayed gratification in children.
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Plants convert sunlight into energy through photosynthesis.
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The wind turbine converts wind into electrical energy.
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The Earth's atmosphere scatters blue light, making the sky appear blue.
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Extreme weather events are studied to better understand climate systems.
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