Permafrost
By Christy Ullrich
National Geographic Magazine
Photograph by Bernhard Edmaier, National Geographic December 2007
Permafrost is perennially frozen ground that remains at or below ze READ MORE http://ngm.nationalgeographic.com/geopedia/Permafrost
Tundra
Brynn Schaffner and Kenneth Robinson
Blue Planet Biomes
Did you know that the Arctic Tundra is the world's youngest biome? It was formed 10,000 years ago. Located at latitudes 55° to 70° READ MORE http://www.blueplanetbiomes.org/tundra.htm