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

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

A Montana fossil reveals that Nanotyrannus, once thought to be a young T. rex, was actually a full-grown predator and it's ...

Two paleontologists think they have settled a long-standing debate as to whether certain fossils from the very end of the ...

A new analysis of a fossil unearthed in 2006 provides a fresh line of evidence that a separate tyrannosaur lineage called ...

Nano Tyrannus lancensis was first identified in the 1940s but later largely dismissed by the paleontological community as ...

T. rex's story has been turned on its head by a new discovery about one of the world's most famous fossil finds. One of the ...