BBC: UK scientists are about to set out for Antarctica to investigate the mighty Pine Island Glacier.
The PIG drains about 10% of all the ice sliding off the west of the continent, and has seen a marked thinning and a surge in velocity in recent decades.
Its contribution to sea level rise is now greater than any other glacier on the planet.
The British Antarctic Survey-led team hopes its iStar project will provide new insights into the PIG's behaviour.
The researchers will gather their measurements...