Field paleontologists drill under a dinosaur's 10-ton body block, now separated from the tail, in this undated handout released December 3, 2007. A partially mummified hadrosaur discovered by a teenager in North Dakota, may be the most complete dinosaur ever found, with intact skin that shows evidence of stripes and perhaps soft tissue, researchers said on Monday. The discovery, excavation and analysis of the mummified dinosaur is featured in "Dino Autopsy," premiering December. 9, at 9 p.m. ET/10 p.m. PT on the National Geographic Channel. [Agencies]