CNN — A provocative study published earlier this year proposed that the world's best-known and perhaps best-loved dinosaur, Tyrannosaurus rex, was actually three separate species. Not so fast, says new research published Monday, which argues that T.

One hundred years of Tyrannosaurus rex : the skeletons / Neal L. Larson -- Wyoming's Dynamosaurus imperiosus and other early discoveries of Tyrannosaurus rex in the Rocky Mountain West / Brent H. Breithaupt, Elizabeth H. Southwell, and Neffra A. Matthews ...

At the twilight of the age of dinosaurs, an agile and vicious predator named Nanotyrannus prowled western North America, resembling a smaller version of Tyrannosaurus - about a tenth the body mass - but with several key anatomical differences.

The dinosaur king may yet retain its crown. Earlier this year a study proposed that the iconic Tyrannosaurus rex should be split into three distinct species, but a new analysis says there isn’t enough evidence for such a drastic shake-up. Since it was ...

A new study shows that 67-million-year-old fossils originally discovered around eighty years ago, are that of an adult Nanotyrannus dinosaur and not a young T.rex.

EXCLUSIVE: Mark Witton also believes dinosaurs "may have been much smarter animals than we have given them credit for".

Scientists have unveiled Khankhuuluu, a new Mongolian dinosaur species that predates and closely resembles early Tyrannosaurs. With its long snout, small horns, and lean build, it represents a transitional form between swift mid-sized predators and giant apex hunters like T.