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A once in every 7.5 million year event is unfolding in the Antarctic. And it has scientists scrambling for answers

www.abc.net.au A once in every 7.5 million year event is unfolding in the Antarctic. And it has scientists scrambling for answers

Antarctic sea ice has usually been able to recover in winter. But this time it's different, with levels taking a sharp downward turn at a time of year when sea ice usually forms reliably — and experts are worried.

A once in every 7.5 million year event is unfolding in the Antarctic. And it has scientists scrambling for answers

Antarctic sea ice has usually been able to recover in winter. But this time it's different, with levels taking a sharp downward turn at a time of year when sea ice usually forms reliably — and experts are worried.

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