This undated photo provided by the University of North Florida Office of Research shows a surface shot taken by a drone of some of the remnants of stone at the Blue J village in northwestern New Mexico. Researchers outfitted a customized drone with a heat-sensing camera to unearth what they believe are ceremonial pits and other features at the site of an ancient village in New Mexico. (AP Photo/ by John Kantner)

ALBUQUERQUE, N.M. (AP) — Recently published research describes how archaeologists outfitted a customized drone with a heat-sensing camera to unearth what they believe are ceremonial pits and other features at the site of an ancient village in New Mexico.

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