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.
November 15th, 2012
Episode 224 of 684 episodes
As Chinese communist party prepares to unveil its new leaders Dr Karl discusses the discovery of the new roaming planet with no star of its own to orbit, and we find out if gravity travels at the speed of light.
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