The cold vacuum of space is only a few degrees above absolute zero.
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A sea turtle can navigate using Earth's magnetic field.
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In 1961, a U.S. nuclear bomb was accidentally dropped in North Carolina and nearly detonated.
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The Earth's atmosphere contains trace gases like argon.
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The wind turbine converts wind into electrical energy.
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The U.S. military tested radar systems in classified research programs.
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The Hawthorne experiments studied workplace productivity.
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The Himalayas continue to rise due to tectonic movement.
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