Out-of-place artifact (OOPArt) is a term coined by American naturalist and cryptozoologist Ivan T. Sanderson for an object of historical, archaeological, or paleontological interest found in a very unusual or seemingly impossible context that could challenge conventional historical chronology.

Footprint resembling man discovered along side dinosaur tracks. 

This footprint is from the Zapata track, found in Permian limestone in New Mexico. In 1987, not far from the Zapata track site, paleontologist Jerry MacDonald discovered a variety of beautifully preserved fossil footprints in Permian strata. The Robledo Mountain site contains thousands of footprints and invertebrate trails that represent dozens of different kinds of animals. 

”Petrified Footprints: A Puzzling Parade of Permian Beasts,” The Smithsonian, Vol. 23, July 1992, p.70


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