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If GPS goes dark, this atomic clock could keep the world running
This Portable Atomic Clock Maintained Accurate Time on a Rolling Ship at Sea In A Nutshell Australian physicists built a ...
Add Yahoo as a preferred source to see more of our stories on Google. The Bulletin of the Atomic Scientists members, from left, Jon B. Wolfsthal, Asha M. George and Steve Fetter reveal the Doomsday ...
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