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Light and DarkEpisodes

  1. Next Thursday23:40
    BBC Four

    Light

    1/2Professor Jim Al-Khalili tells the story of how we used light to reveal the cosmos.(R)

  2. Thu 12 Mar 202600:15
    BBC Four

    Dark

    2/2Prof Jim Al-Khalili investigates the 99 per cent of the cosmos that is hidden in the dark.(R)