Drilling begins at lake hidden beneath Antarctic
12 December 2012 Last updated at 23:36 GMT
A British research team in Antarctica has launched a long-awaited project to hunt for life in a lake hidden beneath the ice-sheet.
A team of 12 scientists and engineers has begun work at remote Lake Ellsworth.
They are using a high-pressure hose and sterilised water at near boiling point to blast a passage through more than two miles of ice.
David Shukman reports.