An igloo is a traditional Inuit shelter made out of blocks of compacted snow. These blocks are cut and shaped using a special knife called a "snow knife" and are then stacked in a spiral pattern to form a dome-shaped structure. The blocks are carefully placed to ensure a tight fit, which helps to insulate the interior of the igloo and keep it warm. In addition to snow blocks, igloos may also be reinforced with other materials such as whalebone or driftwood. These materials are used to provide extra support and stability to the structure, especially in areas with heavy snowfall or high winds. The compacted snow blocks used to build an igloo are typically made from densely packed snow that has been allowed to settle and harden. This type of snow is strong and durable, making it ideal for building a sturdy shelter. The blocks are usually cut from large snowdrifts or packed snow banks, ensuring that they are of uniform size and thickness. Once the igloo is constructed, it is typically lined with animal skins or furs to provide additional insulation and create a comfortable living space. The entrance to the igloo is often built lower than the rest of the structure, creating a cold trap that prevents warm air from escaping and cold air from entering. In modern times, igloos are still used by some Inuit communities for temporary shelter during hunting trips or other outdoor activities. However, they are also popular with tourists looking for a unique and authentic Arctic experience. In conclusion, an igloo is built out of blocks of compacted snow, carefully shaped and stacked to form a dome-shaped structure. These blocks are reinforced with materials such as whalebone or driftwood for added stability. The interior of the igloo is typically lined with animal skins or furs for insulation, creating a warm and cozy living space in the harsh Arctic environment.

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