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Kurzgesagt - In a Nutshell: 2015

3x14 What Is Light?

  • 2015-10-15T07:00:00Z on YouTube
  • 5m
  • Germany
  • German, English
  • Documentary
We are so used to some things that we stopped wondering about them. Like light. What is light? Some kind of wavy thing, right? Kind of.
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