5. (b) inside it only You can't tell from this famous image from the 1922 documentary "Nanook of the North", but an igloo builder does all his work from inside the footprint of the structure.

Igloo' is an Inuit word for 'snow house', and 'Inuit' is the word that describes the people who live in the frozen lands of northern Canada, Alaska and ... the inside can warm up to 40 degrees ...