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Tsunamis, giant waves caused by underwater earthquakes, speed across the ocean at...
Fri, 01/14/2011 - 12:16
The Official Canoe Launch
At a ceremony on the edge of the Potomac River in Washington, D.C., Douglas Chilton...
Tue, 10/27/2009 - 11:27
About 100 million years ago, during the heyday of the dinosaurs, reefs were built...
Fri, 12/04/2009 - 14:25