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Light and Dark Light Light - in pictures

Images of Jim Al-Khalili's time during the making of the episode.

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The Paris Observatory

Where Ole Roemer discovered the speed of light in 1672.

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  • Light and DarkLight

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

    Βι¶ΉΤΌΕΔ Four

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