Temperatures colder than space achieved here on Earth using superconducting X-ray laser

Using a superconducting X-ray laser, researchers at SLAC achieved a temperature 4 degrees Fahrenheit above absolute zero.

Temperatures colder than space achieved here on Earth using superconducting X-ray laser
Using a superconducting X-ray laser, researchers at SLAC achieved a temperature 4 degrees Fahrenheit above absolute zero.