The Hottest Science Experiment On The Planet

Brookhaven National Laboratory

From Discover Magazine:

In a Long Island lab, gold particles collide to form a subatomic stew far hotter than the sun.

Rocking the thermometer at 4 trillion degrees Celsius, a subatomic soup that might reflect the state of matter shortly after the Big Bang has set a new world record: It's the hottest substance ever created in a lab. The previous record, recorded at Sandia National Lab in 2006, was a balmy 2 billion degrees Celsius. The core of the sun burns at a chill 15 million degrees.

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