A 240-Million-Year-Old Aquatic Reptile Fossil Challenges When Reptiles Ruled the Sea
![A 240-Million-Year-Old Aquatic Reptile Fossil Challenges When Reptiles Ruled the Sea](https://images.ctfassets.net/cnu0m8re1exe/1i1FelV1YhYGrYMfnOHxmy/71582a92938e4984d4c0d49f93991989/Ancient-Sea-Reptile.jpg)
Re-evaluating an aquatic reptile fossil may rewrite how dinosaurs' precursors populated Earth after a major mass extinction event.
Re-evaluating an aquatic reptile fossil may rewrite how dinosaurs' precursors populated Earth after a major mass extinction event.