That's only 3.67 degrees Fahrenheit above absolute zero.
A view of the tunnel housing part of the upgraded Linac Coherent Light Source X-ray free-electron laser.
If you thought the coldest place on Earth is Antarctica, well, you just might be wrong about that. One of the coldest places on Earth is actually in Menlo Park, California — or more specifically, 30 feet below it. An underground superconducting particle accelerator at the SLAC National Accelerator Laboratory has been cooled down to a mind-boggling minus 456 degrees Fahrenheit . That's just a few degrees above the coldest possible temperature in the universe, absolute zero.
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