Energy-efficient structures

Have you ever wondered how people survive in extreme cold climates, where temperatures plummet to -50°F? One of the most fascinating survival structures is the igloo—a dome-shaped shelter built entirely of snow. But what happens when you light a fire inside an igloo? Contrary to what you might think, the fire doesn’t cause the igloo to collapse. Instead, it creates an … [Read more...] about This Is What Happens When You Build a Fire Inside an Igloo: A Surprising Insulation Technique Explained