The dinosaurs first appeared on Planet Earth around two hundred and forty five million years ago. That's a staggeringly long ...

Around 480 million years ago, in the Paleozoic Era, shallow seas covered what’s now Tennessee. Like in much of eastern North America at the time, ...

“Dinosaurs lived during the Mesozoic Era from around 251 to 66 million years ago.” Shepperd said the distinction between the Paleozoic and the Mesozoic eras is made at the end of the Permian ...

The paleozoic era dates back 541 to 252 million years ago, ending roughly seven million years before non-bird dinosaurs appeared, according to the Natural History Museum.

Yet as animal life diversified into the early Paleozoic era, the history of such interspecies interactions became harder to track. In research published Wednesday in Communications Biology, ...