How Inuit Survived -50°C in Igloos Without Electricity?

Minus 50°C, cold enough to freeze eyelashes white in seconds — yet Inuit hunters built a livable, warm shelter using nothing but wind-packed snow. This video breaks down the actual engineering behind the igloo: the catenary curve that lets it stand with zero support beams, why dense snow insulates almost as well as a modern house wall, and the hidden airflow physics (cold sinking, warm rising) that turns body heat and a single seal-oil lamp into a 35-degree temperature swing. It's a survival technology so effective that U.S. Air Force units still train with it today. #Igloo #Inuit #Arctic #Survival #Engineering #History #Physics #ColdWeatherSurvival #Science #Documentary #HowItWorks #ArcticSurvival #Inuktitut #IndigenousKnowledge #WinterEngineering