Scientists have uncovered why Antarctica became engulfed by ice millions of years before the Arctic. The international research, published in Science, helps solve one of climate science's longest-standing puzzles: how a vast ice sheet could form when Earth was around 5°C warmer than today.

Scientists have uncovered why Antarctica became engulfed by ice millions of years before the Arctic. The international research, published in Science, helps solve one of climate science’s longest-standing puzzles: how a vast ice sheet could form when Earth was around 5°C warmer than today.

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