Some experts claimed it was simply a young T. rex. Others argued it was a completely different animal. A new study answers ...

Debate kicked off in 1988 when a single small tyrannosaur skull discovered four decades earlier was given its own species ...

For years, paleontologists have debated whether the T. rex-like dinosaur in the fossilized tableau and others are indeed ...

Fossils paleontologists initially thought belonged to a juvenile Tyrannosaurus rex actually belong to a new species of ...

A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming the land.

Now, a research team says new evidence resolves the case. The latest clue comes from a complete skeleton — first uncovered in ...

The “dueling dinosaur” fossil still leaves more questions than answers as scientists now attempt to determine their causes of ...

LONDON --Tyrannosaurus rex was a slowpoke. That is the conclusion drawn from the latest research by scientists at the University of Manchester in England, whose study flies in the face of decades of ...

For many years, paleontologists have debated about whether there was a smaller relative of the Tyrannosaurus rex, or if those ...

There are literally decades of research... based on a premise that this article overturns,” said one paleontologist.

King of the dinosaurs the Tyrannosaurus may have been three species and not just the single T Rex, researchers have claimed. T. rex, meaning “tyrant lizard king,” has been the sole species of the ...

Specifically, whether or not certain fossils found in Montana belonged to a young Tyrannosaurus rex or a completely separate, ...