Remains of a dog-sized creature support idea of dinosaurs' South American origin and early, rapid evolution
Fossils of a small carnivorous dinosaur unearthed in New Mexico back up the idea that all dinosaurs originated in what is now South America, evolved quickly and then dispersed from their homeland.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.