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After non-stop summer months, the polar regions have expanded maximally, abundant food turns even the bears sociable. However the shortening of days soon starts reversing the process as frost expands the ice again. So many seasonal m

  • Released: 2011-11-16
  • Runtime: 50 minutes
  • Genre: Documentary
  • Stars: David Attenborough, John Aitchison, Alec Baldwin
  • Director: David Attenborough