The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary Picture taken at the San Diego Natural History Museum . Non-avian dinosaurs, for example, are known from the Maastrichtian of North America. Sixty-five million years ago, an asteroid killed the dinosaurs. Photo by Donald E. Davis/NASA/Wikimedia Commons They were a diverse bunch, and much like the dinosaurs, they were hit hard by the mass extinction. Almost everything we know about the end-Cretaceous catastrophe comes from North. The Cretaceous Period was the last segment of the Mesozoic Era. stable level of biodiversity leading up to the mass extinction at the end of the Cretaceous. [ Image Gallery: Avian Ancestors: Dinosaurs That Learned to Fly].

The Cretaceous Period was the last segment of the Mesozoic Era. stable level of biodiversity leading up to the mass extinction at the end of the Cretaceous. [ Image Gallery: Avian Ancestors: Dinosaurs That Learned to Fly]. K–T extinction, abbreviation of Cretaceous–Tertiary extinction, also including nearly all of the dinosaurs and many marine invertebrates. Birds were the only dinosaurs to survive the mass extinction. Image by Donald E Davis courtesy of NASA/JPL-Caltech, via Wikimedia Commons The end of the Cretaceous Period saw one of the most dramatic mass. Sixty-five million years ago, an asteroid killed the dinosaurs. Photo by Donald E. Davis/NASA/Wikimedia Commons They were a diverse bunch, and much like the dinosaurs, they were hit hard by the mass extinction. Almost everything we know about the end-Cretaceous catastrophe comes from North. Amazing Fossils Depict End Cretaceous Mass Extinction Event Picture Credit: Robert DePalma (University of Kansas) groups of terrestrial vertebrates including the pterosaurs and the dinosaurs as well as the extinction of. Photos: Cretaceous 'Graveyard' Holds a Snapshot of the Dino-Killing by the asteroid impact that marked the end of the reign of the dinosaurs. Though dinosaurs ruled throughout the Cretaceous, the dominant groups shifted See images from the Nat Geo Travel Photo Contest. Sixty-five million years ago, the last of the non-avian dinosaurs went extinct. So too The cause of the mass extinction that marks the end of the Cretaceous and the See images from the Nat Geo Travel Photo Contest. The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary Picture taken at the San Diego Natural History Museum . Non-avian dinosaurs, for example, are known from the Maastrichtian of North America.