Science & Medicine,
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5 live's science podcast, featuring Dr Karl, plus Dr Chris and Naked Scientists Chris Smith and Kat Arney with the hottest science news stories and analysis.
September 20th, 2012
Episode 204 of 684 episodes
Dr Rhod and Dr Karl are joined by Professor Geraint Lewis, an expert on Astrophysics, Cosmology, Black Holes, Relativity and a huge number of other things.
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