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.
October 20th, 2011
Episode 86 of 684 episodes
Dr Karl answers listeners' weird and wonderful questions about the world of science, which include - why woodsmoke can cause asthma? What causes upside down rainbows? And more on the mysteries of black holes.
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