'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.