These stunning images reveal a remarkable glimpse of life at the ends of the earth. Our melting polar worlds have been captured in breathtaking pictures by the BBC for this autumn's landmark natural history series Frozen Planet. It is the last chance to see the world's greatest wildernesses before they change forever, according to narrator Sir David Attenborough. 'The pictures captured behaviour and phenomena that had never before been recorded,' said Sir David, 85. 'Those pictures will become increasingly valuable as time passes. 'For this may well prove to be our last chance to record, in their full splendour, these...