There's a lot of evidence that dinosaurs in colder climates were insulated with feathers and fur.
and colleagues draw on recent fieldwork to argue that dinosaurs could — and did — survive low temperatures.it's"a total misconception" that all dinosaurs lived in a hot, prehistoric forest."Dinosaurs [living] in high latitudes and in polar regions — in places [where] it's freezing in the winter times — is not marginal. That's what they did," he says.The new evidence comes in the form of what researchers call"lake ice-rafted debris.
"There's no hydrodynamic way to get those big grains out in the middle of the lake unless they were rafted out there," Olsen says. While the sediment analysis was the group's"fundamental discovery," they found something else, too: dinosaur footprints."So, we know dinosaurs were living in that era," he says.This is hardly the first evidence that dinosaurs lived in very cold climates.
That specimen was a flying dinosaur that belonged to the order Pterosaur."Since then, every pterosaur that's been properly looked at has these filaments," he says. And it's not just pterosaurs. Ten years ago, researchers also working in China reported Yutyrannus, which means"feathered tyrant." It got the name from similar filaments. In the new paper, Olsen and his co-authors use their new lake sediment data to make the case thaton their bodies.
."In pterosaurs, it's a covering like fur all over their bodies," he says. He points to something else, too: all kinds of dinosaurs sported the filaments, not just those that could fly. Late Triassic and early Jurassic than it is today. This new study shows that the ancient Earth — like the planet today — was very different in different places.
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