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Reindeer are built to live in freezing Arctic regions like northern Norway, where this herd was photographed under the swirl of the aurora borealis, or northern lights. Reindeer have evolved unique features that help them to thrive in harsh environments. Their noses warm the air they breathe before it enters their lungs, which helps to maintain a steady body temperature. And most of their bodies, including their hooves, are covered with thick, dense fur to keep them well insulated.
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