The Inuit people, commonly called Eskimos, adapted to the harshest environments known. The snow house or Igloo protected families from the elements. Snow blocks were cut from compacted snow and stacked in spiral fashion, circling up to close in the dome. An ice "window" added to the inner light and ambiance. The blubber lamp heated the interior with its small flame. The entrance tunnel led downward to the Igloo interior so that heat would not escape. This design was clever and efficient. 

Click here to see the Igloo video.