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Finding bodies buried in unmarked graves can be extremely difficult, but lasers might be able to help.
Lidar uses quick pulses of laser light to make a 3D map of a surface. Katie Corcoran at Oak Ridge National Laboratory in Tennessee and her colleagues used it to measure how the surface of a shallow grave changes over time, in the hopes that it could be used to find the bodies of missing murder victims.
The researchers dug four shallow pits and buried corpses of individuals who had …