Scientists have found what they say is the first evidence of a volcanic eruption under the Antarctic ice sheet.
They believe the volcano erupted about 2,000 years ago, and would have burst through its ice covering, producing a burst of steam and rocky debris.
The British Antarctic Survey (Bas) scientists report their finding in the journal Nature Geoscience.
They say it could aid understanding of an ice mass which is likely to play a key role in climate change.
The researchers discovered the eruption's traces by analysing radar data collected during an airborne survey of the area in 2004/5.
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