Scientists are using advanced technology to lessen the danger from sinkholes like the one in Florida that swallowed part of a house. Ground-penetrating radar can scan sites for cavities 50 feet or ... more 
Scientists are using advanced technology to lessen the danger from sinkholes like the one in Florida that swallowed part of a house. Ground-penetrating radar can scan sites for cavities 50 feet or more below the surface. (March 6) less 
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Wed, Mar 6, 2013 7:08 PM EST