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Title  2017 GBS Times(The 1st Digital Edition) : Science (III)
Date  2018-04-10 11:15:03
Writer  전준현 Hit  66
File Wy is the sky dark at night.mp4 동영상1 링크 

  Why Is The Sky Dark At Night?  


This video will introduce a well-known brainteaser.

While watching this video, you can learn about the Olbers' paradox, which troubled many scientists! 

 

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