Bare rock and meltwater pools mark the edge of the shrinking Harrison Glacier in Montana's Glacier National Park. Of the 150 glaciers found in the park a century ago, only 27 remain. And scientists predict that by 2030, those will all be gone.

In 2008, photographer James Balog, founder of the Extreme Ice Survey, and several research colleagues will return to the 26 solar-powered cameras they've installed at 16 glaciers worldwide to download the photographs taken so far. Balog hopes to release some images to the public immediately.