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Scientists agree that all non-avian dinosaurs became extinct at the K–Pg boundary. The dinosaur fossil record has been interpreted to show both a decline in diversity and no decline in diversity during the last few million years of the Cretaceous, and it may be that the quality of the dinosaur fossil record is simply not good enough to permit ...
Dimetrodon is often mistakenly called a dinosaur or considered to be a contemporary of dinosaurs in popular culture, but it became extinct some 40 million years before the first appearance of dinosaurs. Being a synapsid, Dimetrodon is actually more closely related to mammals than to dinosaurs, birds, lizards, or other diapsids. [158] [159]
The author then spends two chapters describing the evolution and characteristics of Tyrannosaurus rex and its ancestors, his "favorite dinosaur". [4] In the next chapter he emphasizes that dinosaurs did not go extinct, but rather continue today as birds. He discusses various discoveries of feathered dinosaurs, how the scientific consensus came ...
Exactly why they were so evolutionarily successful is a long-standing mystery, but new research suggests some answers to this question may be contained in what they left behind: dinosaur droppings.
The most famous of these mass extinction events — when an asteroid slammed into Earth 66 million years ago, dooming the dinosaurs and many other species — is also the most recent. But ...
A study reveals the chemical makeup of the Chicxulub asteroid that collided with Earth and resulted in the extinction of nearly all dinosaurs 66 million years ago. Dinosaur-killing asteroid was ...
Between 23% and 34.1% of marine genera went extinct. [1] [2] Plankton diversity dropped suddenly, [23] but it was relatively mildly impacted at the Triassic-Jurassic boundary, although extinction rates among radiolarians rose significantly. [24] Ammonites were affected substantially by the Triassic-Jurassic extinction and were nearly wiped out ...
Why did the dinosaurs go extinct? A new study says it may have been because of their eggs and a long incubation period. The study, published in Proceedings of the National Academy of Sciences ...