"It is essentially the process of looking at living relatives on either side of the family tree of prehistoric ... non-avian cousins, such as Tyrannosaurus rex? Roger Harris/SPL/Getty Images ...

like the Tyrannosaurus Rex, the Deinonychus and the Velociraptor. However, the dinosaur we’re talking about today is a strange addition to the family tree of the feathery theropods called the ...

The classic Tyrannosaurus rex, defined from a skeleton now housed ... comprehensive charting of the tyrant lizard king’s family tree. “No one hypothesis—whether it’s individual variation ...

and dinosaur family trees. T-rex itself evolved in North America, particularly in Laramidia — the western part of the continent during the Cretaceous period. The study challenged the claims of an ...

A recent study led by Cassius Morrison, a paleontology doctoral student at University College London, has shed light on the origin of the Tyrannosaurus ... and the T. rex family tree.

A “fierce debate” over the origins of Tyrannosaurus rex may have finally been laid to rest. By combining information on the fossils and evolutionary trees of tyrannosaurs and their close relatives the ...

The direct ancestor of Tyrannosaurus rex would have arrived ... data from the existing fossil record and the T. rex family tree, as well as climatic and environmental conditions, Morrison said.

The direct ancestor of Tyrannosaurus rex would have arrived in North America ... models that incorporate data from the existing fossil record and the T. rex family tree, as well as climatic and ...