The World's Most Accurate Clock. Ever. [Monster Machines]

138 Million years. That's how long it's been since dinosaurs first appeared on Earth. And how long it'll take for this clock to lose a second. More »

Source: http://feeds.gawker.com/~r/gizmodo/full/~3/lM_DMMGzTMo/the-worlds-most-accurate-clock-ever

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