
Professor Jim Al-Khalili shows how, by uncovering its secrets, scientists have used light to reveal the universe.
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Air Date: 2016-10-10
The story of how we used light to reveal the cosmos begins in the 3rd century BC when, by trying to understand the tr...
Air Date: 2016-10-17
The first hints that there might be more out there than meets the eye emerged from the gloom in 1846 with the discove...