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YouTubeNational Geographic
The Cosmic Calendar | Cosmos: Possible Worlds
The Cosmic Calendar visualizes the chronology of the universe, scaling approx. 13.8 billion years to one single year for perspective. Subscribe: http://bit.ly/NatGeoSubscribe Watch all clips of Cosmos: Possible Worlds here: https://bit.ly/WatchCosmos Get More Cosmos: Possible Worlds: https://on.natgeo.com/2TUWdWC #NationalGeographic # ...
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