In this undated image released by Mexico's National Anthropology and History Institute (INAH) on Monday, July 22, 2013, the tail of a dinosaur is uncovered at a paleontological dig site near the town of General Cepeda in northern Mexico. Paleontologists say they have uncovered 50 vertebrae believed to be a full dinosaur tail that they say resembles the remains of a hadrosaur or crested duckbill dinosaur. Paleontologist Felisa Aguilar said they uncovered roughly half of the dinosaur which was 36 feet (12 meters) long and lived 72 million years ago. (Photo by Mauricio Marat/AP Photo/INAH)
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