Ice hampers Antarctic ship rescue
28 December 2013 Last updated at 08:35 GMT
A scientific mission ship, trapped in dense pack ice off east Antarctica, is still awaiting rescue after a Chinese icebreaker failed to reach it.
The Snow Dragon icebreaker was itself stalled by heavy ice, officials say.
Professor Chris Turney is leading the Australasian Antarctic Expedition and spoke to the BBC from onboard the ship.