The word igloo commonly refers to snowhouses, although in fact iglu means simply 'a house' and can describe traditional tents, homes constructed of driftwood and sod houses, as well as modern accomodation.
Smilla is referring to an igloo built of snow and lined inside with animal skins, which raises the temperature inside up to 20°C.
Ilya Prigogine was a Russian-born naturalized Belgian scientist, who in 1977 was awarded the Nobel Prize for chemistry for his dissipative structures theory. His work is often seen as a bridge between natural and social sciences. Prigogine also undermined the concept of determinism as a viable scientific belief.