The new species, named Tyrannosaurus mcraeensis, was uncovered in the Hall Lake Formation in New Mexico.
Science Lab - Discover the Tyrannosaurus - Dino Safari Park
Tyrannosaurus rex / Useful Notes - TV Tropes
A tiny T. rex ancestor shows how fast tyrannosaurs became giants
T. rex's older, equally hulking relative found in New Mexico
Imagine T. Rex. Now Imagine It With Lips. - The New York Times
Closest dinosaur relative to T-rex may just have been found
Meet T.Rex's closest relative! Scientists discover the remains of a ferocious dinosaur that roamed New Mexico 71 million years ago
New Dinosaur Species Closest Relative to T. Rex Found
Closest Known Relative Of T. Rex Discovered From 72 Million-Year-Old Skull
New species is older relative of T. rex
Fossil Find Challenges Theories on T. Rex - The New York Times
Tyrannosaurs: The 'Kings' of the Cretaceous, by Panos Grigorakakis, Tales of Prehistory
New Dinosaur Considered T. Rex's Closest Relative Discovered 30 Years After Being Displayed in New Mexico Museum
Billions of fearsome T-Rex dinosaurs once roamed North America, new study shows, maybe in your backyard – Daily Democrat
T. rex's older and equally sizable relative discovered in New Mexico, News