When dinosaurs ruled the Earth: Billions of T.rexes once prowled North America – study
Researchers studying North American dino fossils have estimated how many T.rexes roamed the continent during the Cretaceous period 145.5 to…
Researchers studying North American dino fossils have estimated how many T.rexes roamed the continent during the Cretaceous period 145.5 to…
The fearsome Llukalkan aliocranianus roamed the South American continent during the Cretaceous period, more than 66 million years ago. The…
The reptiles first appeared during the Triassic period and became the dominant terrestrial vertebrates after the Triassic-Jurassic extinction event some 200…