Global Warming
Seeking Higher Ground
Presumed extinct until its rediscovery in 1951, the Bermuda petrel has defied all odds to survive. But a new threat—rising seas—could destroy the small islands the birds live on. An evacuation led by a determined ornithologist may be their only hope.
By Rachel Dickinson
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The Borderlands
Dead End
The border between Arizona and the Mexican state of Sonora is far from static: desert, mountains, and forests contribute to a diverse landscape rich in wildlife. But a U.S. plan to halt immigration through the construction of 295-mile-long fence threatens to fragment habitat vital to struggling populations of southwestern animals, including Sonoran pronghorn and jaguar.
By Michelle Nijhuis
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Photo Essay
Walk This Way
Kenya’s Tsavo National Park is one of the largest wildlife sanctuaries in the world—with some of the biggest animals. Here, herds of elephants roam freely amidst acacia trees, their future brighter than it once was.
Photography and text by Kim Hubbard
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Energy
Grass Is Greener
The environmental pitfalls associated with corn-derived ethanol production have researchers still looking for biofuel alternatives. Mounting evidence now suggests that to get out of this energy crisis, it might take returning to our country’s roots—namely, the tall grasses of the prairie. 
By Tom Yulsman
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On the cover: When this downy Bermuda petrel chick comes of age, Jeremy Madeiros will transfer it from its original nest to one in a more secure location. Photo by John Huba.