Super-accurate atomic clock used in real world for first time

Atomic clocks are the best timekeepers, but they usually must be kept in a lab to work. Now, they've been used to measure gravity's effect on time in the Alps  

from #AlexandrosSfakianakis via Alexandros G.Sfakianakis on Inoreader http://ift.tt/2BVWy4T
via IFTTT