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.
March 5th, 2012
Episode 118 of 680 episodes
Why the working classes are more gentlemanly than the upper classes, how hippos can select the sex of their offspring, and the discovery of a device which stops people talking.
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