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Human embryonic stem cells restore hearing loss in gerbils; How social networks influence turnout numbers in elections; Killer whale boys are their mother's favourites.

(Image: A human ear. Credit: Science Photo Library)

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18 minutes

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Mon 17 Sep 201201:32GMT
BBC World Service Online

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06/09/2012

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  • Thu 13 Sep 201218:32GMT
    BBC World Service Online
  • Fri 14 Sep 201203:32GMT
    BBC World Service Online
  • Fri 14 Sep 201210:32GMT
    BBC World Service Online
  • Sat 15 Sep 201221:32GMT
    BBC World Service Online
  • Mon 17 Sep 201201:32GMT
    BBC World Service Online

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