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Grand Coulee Dam
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Published January 25, 2009
This natural-color image shows Grand Coulee Dam on the Columbia River in Washington, as well as the large area of cropland irrigated by the reservoir upstream.
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Mt. Marra, Sudan
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Published January 20, 2009
In western Sudan, lies a network of volcanic mountains and fertile valleys where just enough rain falls to sustain agriculture. This mountainous region contains a volcanic field known as Jebel Marra.
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Porcupine Gorge, Queensland, Australia
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Published January 18, 2009
Porcupine Gorge and other sandstone canyons carving through a basalt plateau create dramatic topography in central Queensland.