Igloos were temporary shelters where the eskimos could keep warm. Snow and ice are great insulators. If the fire inside is built right it will be warm enough to survive but not too hot to melt the structure. read more
An igloo is adapted to the environment due to its round shape. No corners to catch the wind or flying debris. Some igloos, like some of the ones in Canada, are made of snow blocks and take less than 2 hours to build. read more