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Ninth Planet 'Discovered'

Interview with Konstantin Batygin one of the scientists from Caltech who discovered the giant planet. Hottest year ever. What constitutes a bad password?
( Photo: Artists impression of a new planet. Credit PPARC/PA )

23 minutes

Last on

Wed 20 Jan 201619:06GMT
BBC World Service except East and Southern Africa, News Internet & West and Central Africa

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Broadcast

  • Wed 20 Jan 201619:06GMT
    BBC World Service except East and Southern Africa, News Internet & West and Central Africa