An artist's impression of a Tyrannosaurus Rex ... "It doesn't make sense to compare the body sizes of fossil species known from scanty remains. "There are some extinct species—mammoths, for ...

Scientists have raised concerns about the lack of Tyrannosaurus rex fossils for their research ... easily identifiable from its massive body, menacing jaws and sharp teeth. Touted as one of ...

rexes," Lyson said. Having juvenile specimens helps reveal the Tyrannosaurus growth rate and body changes during maturation, Lyson said. Only a handful of such fossils are available for study.

Kumiko via Wikimedia Commons under CC BY-SA 2.0 Around 66 million years ago, the iconic and terrifying Tyrannosaurus ... size, body size variation and the incompleteness of the fossil record.

There's no denying that Tyrannosaurus rex was one of the biggest ... They also considered variations in body size based on sexual dimorphism — size differences between the sexes of animals ...

Tyrannosaurus rex may be the most famous dinosaur to ever roam the Earth, but these days, it’s at the center of a very modern problem: the luxury fossil trade. According to a study published in ...

rexes," Lyson said. Having juvenile specimens helps reveal the Tyrannosaurus growth rate and body changes during maturation, Lyson said. Only a handful of such fossils are available for study.