Science: Crystal time-space clock that may survive heat death of universe 1

Science: Crystal time-space clock that may survive heat death of universe

Xiang Zhang (seated) and Tongcang Li have proposed a way to make a four-dimensional space-time crystal
Xiang Zhang (seated) and Tongcang Li have proposed a way to make a four-dimensional space-time crystal
Roy Kaltschmidt, Berkeley Lab
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