Looters who plundered one of Utah’s newest troves of dinosaur bones got away with ribs, vertebrae and part of an ancient legbone they had to bust apart to remove.

They also stole hidden scientific clues about the life of a young diplodocus dinosaur that roamed the area some 150 million years ago."It’s like pieces of a puzzle that are now gone," said Scott Williams, collections and exhibits manager at the Burpee Museum of Natural History, the Rockford, Ill.-based institution that has been digging at the U.S. Bureau of Land Management-owned site.The bones — and the thieves — from the site near Hanksville haven’t been seen since the theft last fall. And, odds are, they won’t. Stolen dinosaur bones and other fossils snatched illegally from federally owned land often disappear into living rooms, lucrative underground markets or expensive private collections.