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A vast hole in Earth's ozone layer yawns open every summer over Antarctica. Since atmospheric ozone shields us from a lot of ultraviolet radiation, losing it means a lot more mutations. But as bad as that sounds, repairing the hole could mean destroying the planet. Now scientists from Columbia University have discovered that the ozone hole is actually keeping the antarctic cold, slowing the erosion of ice sheets like the Larsen Ice Shelf (pictured), which began to crumble this year due to elevated temperatures. It could be that the hole is all that stands between us and a completely melted south pole. More »
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