Though it"s December, it isn"t cold and snowy everywhere in North America. Here, near Tucson, Arizona, the Sonoran Desert stays warm year-round. In this photo, we"re looking at a "sky island"—an isolated, high-elevation woodland surrounded by radically different lowland environments. In this case, the desert land at the base of the mountain is peppered with saguaros—a stately cactus recognized for its long arms. The snow-capped Santa Catalina Mountains in the distance are part of the Madrean Sky Islands and are home to Mount Lemmon Ski Valley, which is the southernmost ski destination in the US. The ski area covers the slopes of Mount Lemmon, which reaches an elevation of about 9,100 feet at the summit and can receive around 180 inches of snow annually.
Sky island views
Today in History
More Desktop Wallpapers:
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New York City skyline
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Celebrating Pi Day
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‘Think equal, build smart, innovate for change’
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Come out of your shell for World Turtle Day
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Village of Labro, Italy
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A timeless view of the night sky
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Jazzed for Mardi Gras
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Ad-Deir, Petra, Jordan
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Let the games (finally) begin!
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Don’t get lost in there
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This reef is nowhere near the sea…
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A good time in the Badlands
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Aqueduct, Arkadia Park, Poland
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‘Fringe’ takes center stage as Edinburgh celebrates the arts
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Norway s Kjeragbolten boulder
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Ostuni, Apulia, Italy
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Earthrise on Moon Day
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Storm rolls over the grasslands
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Wild scene on the Merced River
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Hues of Hokkaido
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Ocean City, Maryland, at sunrise
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Vacuum Chamber 5 at Glenn Research Center
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Mada in Saleh, Saudi Arabia
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Swimming with the sea cows
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Aerial view of a heart-shaped field in Trittau, Germany
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Lanterns alight in Pingxi
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Tortula moss, Netherlands
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International Museum Day
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World Space Week
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A ‘Superior’ paddle
Bing Wallpaper Gallery

