Vivid footage of the Sonoran and Mojave deserts reveals climate, soils, plants, and animals. Special attention is paid to the adaptations of some desert organisms, which allow them to live in this harsh biome. The climate, plants, and animals of the tundra, or "cold desert" are also discussed. Other terminology includes: Chihuahuan, Sahara, arid, saguaro cactus, permafrost, arctic tundra, alpine tundra, caribou, and ptarmigan.
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