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The Gravity Recovery and Climate Experiment, or GRACE, used a pair of satellites to measure water use in the world's aquifers.
June 17, 2015 New data suggest that many regions in the world are overusing their underground water supplies. And researchers aren't sure how much remains.
Shinichi Kuramoto of the Center for Deep Earth Exploration in Japan displays a replica of earthquake fault rock.
TOSHIFUMI KITAMURA/AFP/Getty Images
September 28, 2013 Water pools, oilfields, undersea volcanoes. By exploring the planet's interior, we are making new, unexpected discoveries and learning more about life above the surface — and perhaps deep within ourselves.
Check out some of the world's most important - and threatened - aquifers. Click to see a high-resolution version of this map.
August 8, 2012 Farmers are emptying some of the world's most important aquifers faster than rainfall can replenish them, which means less water for everyone. This map from the journal Nature shows where irrigation is doing the most damage.
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