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The Science of Doctor Who Clips

  1. Black holes and event horizons (pt 2/2)

    Duration: 07:29

  2. The nature of light

    Duration: 06:35

  3. Are we alone in the universe?

    Duration: 07:13

  4. Black holes and event horizons (pt 1/2)

    Duration: 06:11

  5. Special relativity and the constant speed of light

    Duration: 05:56

  6. Brian Cox tests the Doctor

    Duration: 01:09

  7. The Science of Doctor Who: Trail

    Duration: 00:25