How do our bodies adjust to extreme temperatures?

This man clearly harbors no qualms about the cold. The native Norwegian achieved viral renown some weeks back for skating on and swimming in Norway's Lake Goksjo almost entirely nude, save for a pair of speedos and a wreath of ice worn round his neck. We know what you're thinking: How I can I be like this man? Let us… » 1/17/14 11:59am 1/17/14 11:59am