Paleontologists are being forced to compete with rich collectors for access to dinosaur skeletons. When it comes to T. rexes ...

More than half of the world's scientifically useful T. rexes are in the hands of private or commercial owners, and not ...

The Tyrannosaurus rex known as Stan, excavated in South Dakota in 1992, is one of the most complete Tyrannosaurus rex skeletons in the world. Greg Latza / AP Images Tyrannosaurus rex has always ...

Commercial collectors have discovered 2.4 times more T. rex fossils than public institutions since the early 1990s.