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Everyone covets the dwindling waters of Peru's Cordillera Blanca. For agribusiness, they are a way to make the desert bloom; for energy utilities, a source of power; for peasant farmers, a gift from God.
Lima, the capital of Peru, was built more than 500 years ago in one of the world's driest deserts. Today the city has to sustain a population of nine million. Meanwhile, high in the Andes, a magical and life-sustaining world of snow peaks and glaciers is rapidly melting away. Can Peru survive? The answer will have implications for all of us.


E. O. Wilson
Looking back on his 60-year career, the pioneering biologist talks about ants, mass extinction, and the perverse ways in which Homo sapiens has created a "Star Wars civilization."
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Tired of all those wasted hours sitting bumper-to-bumper staring at "Road Work Ahead" signs? Here are nine paths to cleaner, safer, and faster travel.
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On the back roads of New Mexico, the sense of place is powerful -- and everyone feels it in his or her own way.
The Synthesist
Infrared light, invisible to the human eye, may be an unexpected source of solar energy.
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Tim Folger is skeptical of claims that there is a silver lining in the dark clouds of climate change.
Eels: The World's Most Mysterious Fish Spotlight: Wild Wonders of Europe The Day After Tomorrow: Images of Our Earth in Crisis
Open Space
Seeing things up close from a kayak can be a study in ambiguity -- beauty mixed with ugliness.
A rock star teacher and a group of passionate students show a new way for school to be cool.