How mass extinctions drove the evolution of dinosaurs

For 20 privileged Victorians, Benjamin Waterhouse Hawkins held a lavish New Year's dinner party in 1853 inside a model of a dinosaur that was created for the Great Exhibition held two years earlier. Hawkins's models, which ...

Bird ancestor reclaims its branch on tree of life

Venerated for 150 years as the forebear of all birds until being relegated two years ago to the common class of winged dinosaurs, the Archaeopteryx was restored to its hallowed branch on the tree of life on Wednesday.

Winged dinosaur Archaeopteryx dressed for flight

Since its discovery 150 years ago, scientists have puzzled over whether the winged dinosaur Archaeopteryx represents the missing link in birds' evolution to powered flight. Much of the debate has focused on the iconic creature's ...

Dinosaurs with killer claws yield new theory about flight

(PhysOrg.com) -- New research from Montana State University's Museum of the Rockies has revealed how dinosaurs like Velociraptor and Deinonychus used their famous killer claws, leading to a new hypothesis on the evolution ...

The sea dragons bounce back

(PhysOrg.com) -- The evolution of ichthyosaurs, important marine predators of the age of dinosaurs, was hit hard by a mass extinction event 200 million years ago, according to a new study from the University of Bristol published ...

Living dinosaurs: The evolutionary history of modern birds

"Even the wide interval between birds and reptiles has been shown by the naturalist to be partially bridged over in the most unexpected manner, on the one hand, by the ostrich and extinct Archeopteryx, and on the other hand, ...

Size of mammals exploded after dinosaur extinction

Researchers demonstrate that the extinction of dinosaurs 65 million years ago made way for mammals to get bigger - about a thousand times bigger than they had been. The study, which is published in the prestigious journal ...

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