Antarctica, a part of the world that researchers had previously believed was bucking the trend of global warming, is getting warmer after all, according to a newly released study.

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A huge slab of ice has fallen off the western Antarctic peninsula, threatening the ice shelf behind it. Scientists say the collapse shows how quickly polar changes can occur amid certain climate conditions. A climatologist explains.

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An international team of researchers has found more than 700 new species in the extreme depths of Antarctica's Weddell Sea, surprising scientists who had thought the region was largely devoid of life.

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