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Bad News, Everyone: You'll Have To Wait An Extra Second For 2016 To End The Prague Astronomical Clock, a medieval clock that's more than 600 years old. An extra second will be added to world clocks at the end of 2016.
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Here's the path of 2017's solar eclipse This video from NASA shows the path across the U.S. of the August 2017 solar eclipse. On August 21, 2017 a total eclipse of the sun will be visible from a narrow corridor crossing the United States.
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Reflecting On 2016: The Year In Health And Science09:29 Merging black holes ripple space and time in this artist's concept. Pulsar-timing arrays - networks of the pulsing cores of dead stars - are one strategy for detecting these ripples, or gravitational waves, thought to be generated when two supermassive ...
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