Thermal performance of sunken houses

❄️🔥 Long before central heating and insulated walls, surviving winter was a battle between humans and the cold itself. People built shelters from snow, earth, wood, animal skins, and whatever nature offered, relying on ingenuity to stay alive when temperatures fell dangerously low.
Tonight, close your eyes and step into the quiet world of early winter survival — where fire, shelter, and determination were the only things standing between life and the frozen dark.

👉 Boring History For Sleep | Cold nights, warm fires, ancient survival. 💤