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
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Welcome to Scotland s garden
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Sequential images of a total solar eclipse
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Falling for Tennessee
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Happy Cinco de Mayo!
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Frost on autumn leaves
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International Cheetah Day
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This reef is nowhere near the sea…
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A march toward a dream
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Infrared Jupiter, erupting Io
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Oh, the places you’ll go
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Southern gemsbok in the savannah, Botswana
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Travel Sunday: San Francisco
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Rockin with the rockhoppers
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Horsetail Fall, Yosemite National Park, California
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D-Day remembered
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A Flag Day tradition
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Engineering an artificial harbor in Normandy
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Hooray, hooray, it s Unicorn Day!
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No, it s not a leaf. Happy Look-alike Day
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Who left the tub running?
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It s fair season
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Endangered Species Day
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Happy Mothers Day!
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Happy Father s Day
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Vatican City with St. Peters Basilica
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American bison
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Madame Sherri Forest, New Hampshire
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Golling Waterfall, Salzburg, Austria
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Who s there? The largest owl in the world
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Bournemouth beach huts
Bing Wallpaper Gallery

