Hyperborea: The Northern Polar Region of Mars

From the publisher's blurb: This article deals with Hyperborea, the northern polar region of the Red Planet. The topography and climate of the southern polar region are fairly similar, but its flora and fauna are completely different, since evolution in the two areas has been separate with no opportunity for any creatures to migrate between them (look at the dissimilar animals of Earth's Arctic and Antarctica to see the magnitude of the differences).