| http://www.w3.org/ns/prov#value | - The 1968 University of Colorado report, compiled by a team headed by James Condon, documented numerous instances of areas where soil, grass, and other vegetation had been claimed by witnesses to have been flattened, burned, broken off, or blown away by a UFO. A report by Stanford University astrophysicist Peter Sturrock, who led a scientific study of physical evidence of UFOs in the late 1990s, de
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