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5y
whoa! cool stuff! those clocks look so cool and almost magical. do they use lasers there or some crystals or like that? :)
whoa! cool stuff! those clocks look so cool and almost magical. do they use lasers there or some crystals or like that? :)
RE: New atomic clocks measure time dilation at millimeter scale/Nuevos relojes atómicos miden la dilatación del tiempo a escala milimétrica