How He Sank His Cabin Half Into the Ground — the Earth Kept It 50 Degrees When It Was 20 Below

A frontier man digs a pit four feet deep the size of his cabin footprint and builds his log cabin down inside it so only the roof and upper walls are above ground. The earth walls below grade hold a constant temperature year round. He banks the exposed upper walls with sod. From the outside it looks like a cabin sinking into the prairie with just the roof poking out. Inside he stays warm with a tiny fire while above-ground cabins burn through cords of wood.