A team of Bristol scientists has called off its mission to drill deep into an Antarctic ice sheet in the hope of finding life in an ancient lake.
Drilling was proceeding well during the weekend after a replacement part was fitted to the boiler used to heat water for drilling.
Drilling stopped after the team was unable to form properly the water-filled cavity 300 metres beneath the ice.
This cavity was to link the main borehole with a secondary borehole used to recirculate drilling water back to the surface.
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The pair pleaded guilty to their part in the burglary of two banks in which explosives were used.