The Surprising Thermal Power Of Snow

An igloo is not just a pile of ice; it is a highly efficient insulator. Because trapped air bubbles inside packed snow block heat from escaping, these structures can keep interiors significantly warmer than the outside air.

While it sounds counterintuitive to build a home out of frozen water, snow is actually a fantastic building material. It acts like a thermal blanket, preventing heat from leaking out into the frigid environment. A person inside can stay warm enough to melt the inner walls slightly, which then refreezes to form a solid, wind-resistant ice shell. This clever design creates a cozy sanctuary in the harshest Arctic conditions.