Negative Temperatures That Are Hotter Than The Sun

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.

Source: http://www.npr.org/2013/01/04/168624854/negative-temperatures-that-are-hotter-than-the-sun?ft=1&f=1007

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