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Finding mass graves from on high

3:24pm, March 4, 2008

From Washington, D.C., at a meeting of the American Academy of Forensic Sciences

Aerial surveys that scan the ground at many wavelengths, some visible and some not, may offer a way to quickly and easily detect clandestine mass grave sites.

During field tests in Costa Rica, Margaret Kalacska, a remote-sensing analyst at Simon Fraser University in Burnaby, British Columbia, and her colleagues buried several slaughtered cattle—a weight approximately equal to that of eight adult humans—in a hole 5 meters square and 1.5 m deep. In smaller holes nearby, they buried single carcasses. Yet another hole was filled with nothing but soil.

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