For more than a decade, paleontologists have speculated about a single fossil that preserves skeletons of two of the world’s most famous dinosaurs, Tyrannosaurus rex and Triceratops. Not only ...

In 1971, Lawrence Loendorf, an archaeologist who had heard that there were bones in the cave, collected a few mammal fossils and a red jasper knife at the base of the pit. Other than the knife and ...