2017-11-10 07:27:50 UTC
and creating rivers and lakes beneath the ice.
It could have important knock-on effects during periods where there is
already significant ice loss, the scientists warn.
The study hints that a geothermal heat source called a 'mantle plume' lies
deep below Antarctica's Marie Byrd Land.
It might help explain why the ice sheet is so unstable today - and why it
collapsed so rapidly in an earlier era of rapid climate change.