Iglus

An iglu is a type of shelter built from snow, traditionally used by the Inuit people of the Arctic. These structures are typically dome-shaped and constructed by cutting blocks of snow from a compacted snowdrift. The blocks are then stacked in a spiral pattern, with each layer slightly angled inward to create the characteristic dome. The density of the snow is crucial for structural integrity, with denser snow being easier to cut and more stable. The interior of an iglu is often insulated by the snow itself, which traps air and provides a surprising degree of warmth. A small opening at the base allows for entry and exit, and a ventilation hole at the top helps to prevent carbon monoxide buildup from any cooking fires or lamps used inside. While often associated with temporary hunting shelters, larger and more permanent iglus were also built and could house families for extended periods. The science behind the iglu's effectiveness lies in the insulating properties of snow, which can maintain an interior temperature significantly warmer than the frigid outdoor air.