the fossil record suggested that it took up to 10 million years for dinosaurs to spread to the northern half of Pangea, known as Laurasia, which has since been split up into North America ...

But fossil discovery in Wyoming is rewriting that story. Paleontologists at the University of Wisconsin-Madison have unearthed the oldest dinosaur ever found in North America – a creature they ...

"We have, with these fossils, the oldest equatorial dinosaur in the world—it's also North America's oldest dinosaur," study co-lead author and UWMGM researcher Dave Lovelace said in a statement.

"We have, with these fossils, the oldest equatorial dinosaur in the world — it's also North America's oldest dinosaur," said Dave Lovelace, a research scientist at the University of Wisconsin Geology ...