Freezing is one of the easiest, most convenient, and least time-consuming methods of preserving foods. Freezing does not sterilize foods; the extreme cold simply retards the growth of microorganisms and slows down chemical changes that affect quality or cause food to spoil.
Eskimos also use refrigerators to keep food from freezing. But why would they if they live in below-zero temperatures? Well, will you just leave meat or food on the table or somewhere if you have a refrigerator in the house? When out on the ice-covered plains, where you won’t find refrigerators, Eskimos put food in bags made of seal skins to shield it from exposure.