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 17th, 2013
Episode 305 of 680 episodes
Dr Chris Smith and the Naked Scientists look at what might have caused the "Tunguska Fireball" in 1908, the use of bacteria to repair crumbling concrete and the effect of tobacco advertising on teens.
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