Now a research team said there’s new evidence that resolves the case. The latest clue comes from a complete skeleton — first uncovered in 2006 in Montana — that scientists say identifies the mystery reptile as its own species and not a juvenile Tyrannosaurus rex.

The new species is called Nanotyrannus. Compared to the well known tyrannosaurus rex, a nanotyrannus was more speedy and agile.

This winter, you don't need a DeLorean to go back in time: the Atelier des Lumières s an exceptional journey to meet the dinosaurs! This new immersive exhibition, created in collaboration with the Lightroom studio, takes us back to prehistoric times for an impressive encounter with the dinosaurs.

Newly dated fossils from New Mexico challenge the idea that dinosaurs were in decline—and suggest instead they had formed flourishing communities.

NEW YORK (AP) — Scientists have discovered a new dinosaur from Argentina with powerful claws, feasting on an ancient crocodile bone. The new find was possibly 23 feet (7 meters) long and hailed from a mysterious group of dinosaurs called megaraptorans.

Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million years ago, causing mass extinction.