A particle accelerator is now colder than space to produce 1 million X-ray pulses a second - Space.com

That's only 3.67 degrees Fahrenheit above absolute zero.

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 … [+2662 chars]

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