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Winter in the Arctic is yielding to spring as much as a month earlier than ten years ago. On average, spring is arriving two weeks earlier, as reported in Current Biology. Using the most comprehensive data set available for the region, the researchers documented extremely rapid climate-induced advancement of flowering in plants, and emergence and egg-laying in a wide array of High Arctic animal species. The finding in the Arctic offers an "early warning" of things to come on the rest of the planet.--JULIA WHITTY