‘Scars’ left by icebergs record West Antarctic ice retreat

‘Scars’ left by icebergs record West Antarctic ice retreat
Thousands of marks on the Antarctic seafloor, caused by icebergs which broke free from glaciers more than ten thousand years ago, show how part of the Antarctic Ice Sheet retreated rapidly at the end of the last ice age as it balanced precariously on sloping ground and became unstable.

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