Fossil Evidence Shows Dinosaurs Thrived in North America Before Extinction

TL;DR
New research indicates that dinosaurs in North America were still thriving just before the asteroid impact 66 million years ago, with fossils from the last moments of the Cretaceous period showing diverse and large species like Tyrannosaurus rex, Triceratops, and Alamosaurus, challenging the idea that dinosaurs were in decline before their extinction.
- Fossils reveal dinosaurs were thriving in North America just before being wiped out by asteroid strike, study shows CBS News
- Fossils of Some of the Last Dinosaurs in North America Have a Story to Tell The New York Times
- Rare look at the last days of the dinosaurs shows they were thriving, scientists say CNN
- What really killed the dinosaurs? These rocks may unlock the answer. The Washington Post
- Dinosaurs were thriving until asteroid struck, research suggests The Guardian
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