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.
June 28th, 2012
Episode 172 of 684 episodes
Andy Crane sits in for Rhod Sharp, and he and Dr Karl discuss why rifle bullets fly more truly when they rotate, and whether salt water floats over fresh.
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