California
The black tech superconducting X-ray laser in California has achieved a lower temperature than space
On earth, a particle accelerator that collides electrons together has reached a lower temperature than outer space.  Using the U.S. Department of energy’s SLAC National Accelerator Laboratory’s X-ray free electron laser, scientists cooled liquid helium to minus 456 degrees Fahrenheit (minus 271 degrees Celsius), or 2 Kelvin. This is part of the linear accelerator coherent light source (LCLs) upgrade project, called LCLs II. This temperature is only 2 Kelvin higher than absolute zero, which is the lowest temperature at which all particles stop moving. Creating this cold environment is…
