Vladan Vuletić

Jan. 04, 2013

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. How is that possible?

cold, absolute zero, temperature, physics, statistics, particles, quantum, kelvin

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\tWinter weather means more than sledding and snowmen. Next snowstorm, grab a magnifying glass and try snowflake hunting. Bullet rosettes, stellar plates, and capped columns are just a few of the varieties of snow crystal you can find in your backyard. Kenneth Libbrecht, physicist at Caltech and snowflake expert, shares secrets of the snowflake.

\tVideo originally published on ScienceFriday.com on December 31, 2009

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