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'Ice cracks' around stranded ship

29 December 2013 Last updated at 03:39 GMT

A ship carrying 74 people is still trapped in dense pack-ice in the Antarctic.

The Academician Shokalskiy, which is carrying scientists and tourists, has been stuck since Tuesday.

The latest ice breaker that's on its way to attempt a rescue is an Australian vessel.

Andrew Luck-Baker from the BBC's Science Unit is on board the ship.