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• 04:37

  Sunlight Is Way Older Than You Think - Sten Odenwald

  468 views / 0 likes - added 8 years ago

  View full lesson: http://ed.ted.com/lessons/sunlight-is-way-older-than-you-think-sten-odenwald It takes light a zippy 8 minutes to reach Earth from the surface of the Sun. But how long does it take that same light to travel from the Sun’s core to its surf

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