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  • Feature

    The long and winding Colorado

    Standing on a mesa high above the town of Rifle, Colo., Andres Aslan is having a hard time staying quiet. The lanky geologist from nearby Colorado Mesa University normally speaks in a low-key professorial drone. But here, looking down at a sprawling river valley blazing with autumnal cottonwoods, his enthusiasm cranks up his volume. “This could be it,” says Aslan, gesticulating wildly. “This...
    01/10/2014 - 14:00 Earth, Planetary Science
  • Feature

    Death of a Continent, Birth of an Ocean

    To those who live there, east Africa’s Afar region is “the place the devil plows.” One of the hottest and lowest areas on Earth, it is a landscape of baking desert and barren lava flows. To scientists, though, Afar means something more promising: geology in the raw.

    There, on the edge of Africa, the continent is splitting apart. Pulled inexorably by the...
    06/17/2011 - 10:30 Earth & Environment