They are all from a single species, Albertosaurus sarcophagus, a close relative of T. rex that is classified as a “tyrannosaur” family member.

"Keep in mind, smaller than T. rex can still mean pretty dang big. A full-grown Albertosaurus exceeded 30 feet in length." Meet the dino of the week: the headstrong Stegoceras ...

Albertosaurus beat out the mighty T. rex by a mere 16 votes out of the more than 3,000 votes that were cast both online and with ballots during a 14-day voting period.

A young Albertosaurus, a relative of T. Rex, earns her place in a fierce hunting pack. A young Albertosaurus, a relative of T. Rex, must prove herself in a deadly hunting pack or face starvation ...

It’s something paleontologists dream about, and now for the very first time a positively identified fossil of T. rex skin has been found. In fact a number of skin fossils were found on ...

Episode 4 of 6 Seventy-one million years ago lived a teenage Albertosaurus - a faster, nimbler relative of T. rex. She had to earn her place in a deadly, ferocious pack or risk starvation. Show more ...

A model of “Scotty,” a Tyrannosaurus rex discovered in 1991 near Eastend, Sask., in the Frenchman River Valley is pictured. Handout, Royal Saskatchewan Museum ...