Home / Series / Stephen Hawking's Universe / Aired Order / Season 1 / Episode 5

On the Dark Side

Professor Stephen Hawking shows how we discovered that most of the matter in the Universe is missing and looks at the possible existence of dark matter.

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  • Originally Aired September 28, 1997
  • Runtime 50 minutes
  • Production Code p007v9yt
  • Network BBC Two
  • On Other Sites Official Website
  • Created June 29, 2009 by
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  • Modified February 10, 2025 by
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