coldest thing on earth
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A chunk of copper became the coldest cubic meter (35.3 cubic feet) on Earth when researchers chilled it to 6 millikelvins, or six-thousandths of a degree above absolute zero (0 Kelvin). This is the closest a substance of this mass and volume has ever come to absolute zero.
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A chunk of copper became the coldest cubic meter (35.3 cubic feet) on Earth
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