Now, evidence suggests that some of these spiral-shaped species did manage to persist after all. Recent analysis of ammonite ...

The End-Cretaceous (K-Pg) Extinction: The Final Curtain Around 66 million years ago, Earth endured a mass extinction event that marked the end of the Cretaceous and the start of the Paleogene period.

Everyone knows that dinosaurs are extinct, and most people have some idea about how it might have occurred. But the exact periods in history when it happened are less well known. Was it a single ...

A massive trove of global fossil data has revealed variations in how elasmobranch species – sharks, skates, and rays – recovered after the Cretaceous-Paleogene (K-Pg) mass extinction event. Among the ...

A man has made an unusual discovery in Denmark: a lump of fossilized animal vomit that is thought to be around 66 million years old. These types of fossils are known technically as regurgitalites.

Sharks have roamed the Earth's oceans for more than 400 million years. In the process, the animals have survived five mass extinction events, including the one that wiped out the dinosaurs. This ...

Cretaceous-tertiary cloud chamber / Niles Eldredge -- Palynological change across the Cretaceous-Tertiary boundary on Seymour Island, Antarctica : environmental and depositional factors / Rosemary A.

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Extinction implies that the species that perish are poorly adapted to a changing set of conditions. Faced with an evolving group of competing organisms -- the mammals -- perhaps dinosaurs were driven ...