Today’s birds don’t seem quite as threatening as their gigantic dinosaur ancestors, in part because they lack the teeth that make the Tyrannosaurus rex so terrifying. But why don’t today’s birds have ...

Limusaurus inextricabilis was a dinosaur that had plenty of sharp teeth as a youngster, but then lost them as an adult, shifting its diet from meat to plants in the process Yu Chen Scientists have ...

WASHINGTON - An analysis of fossils of 19 ceratosaurian theropod dinosaurs known as Limusaurus inextricabilis in China showed these extinct animals had teeth as babies that were gradually lost as they ...

As I have written about many times here on Dinosaur Tracking, paleontologists presently have an overwhelming amount of evidence that birds are living dinosaurs. That doesn't mean that everything about ...