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Virginie van Wassenhove (VvW)
1,273 followers -
cognitive neuroscientist
cognitive neuroscientist

1,273 followers
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How long is a second? If you ask a physicist, it has the duration of 9,192,631,770 oscillations of the microwave radiation absorbed or emitted when a caesium atom jumps between two particular energy states. But for some, that is not precise enough!
http://www.nature.com/news/precise-atomic-clock-may-redefine-time-1.13363?WT.mc_id=GPL_NatureNews

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