Try digitalPLUS for 10 days for only $0.99

Real bones

The real bones of the body and legs of the Raptorex kriegsteini dinosaur. University of Chicago paleontologist Paul Sereno says, "We have now leap-frogged in our understanding of how Tyrannosaurus rex and its tyrannosaurid relatives came to be on the strength of one specimen that was almost lost to science." Tribune photo by Nancy Stone