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Negative Temperatures That Are Hotter Than The Sun

Jan 4, 2013 (Talk of the Nation) — Scientists have cooled potassium gas to one billionth of a degree below absolute zero. But in the quantum world, that's actually hotter than the Sun. It's hotter, even, than infinity degrees Kelvin. Vladan Vuleti?, a quantum physicist at MIT, talks about this 'Bizarro World' temperature.

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