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Ancient Heat: A Guide to the Dakota Fire Hole and Outdoor Kotatsu
Modern sleeping bags are a luxury, not a necessity, if you know how to manipulate thermodynamics. By digging a specialized two-hole system into the earth, you can create a high-efficiency furnace that burns invisible to the wind. But the real trick lies in how you sleep over the embers—a maneuver that provides life-saving warmth but carries a hidden, invisible danger for the unwary.
Dec 8, 2020