"Adult musk oxen are tough beasts and can withstand temperatures down to minus 40 degrees Celsius. But <a href=""http://sciencenordic.com/climate-change-threatens-existence-arctic-musk-oxen"" target=""_blank"">scientists are worried</a> for the musk oxen's long term future as the Arctic warms and new parasites move in. (Photo: Lars Holst Hansen)"
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