Learn about the mass extinction event 66 million years ago and the evidence for what ended the age of the dinosaurs.

UPMC Memorial on Friday renamed its intensive care unit in honor of West York police officer Andrew Duarte. Duarte was killed earlier this year during a mass shooting at the hospital. On Feb. 22 ...

Ancient fossils show how the last mass extinction forever scrambled the ocean’s biodiversity. By Stewart Edie, Smithsonian Institution June 10, 2025 ...

Not everything dies in a mass extinction. Sea life recovered in different and surprising ways after the asteroid strike 66 million years ago. Ancient fossils recorded it all.

Today, giant clams and their relatives fill parts of these unique photosymbiotic lifestyles once occupied by the rudists, but they lack the rudists’ astonishing species diversity.Mass extinctions ...

Surprising discoveries on the seafloor. Marine bivalves lost around three-quarters of their species during this mass extinction, which marked the end of the Cretaceous Period.My colleagues and I ...

Ancient fossils show how the last mass extinction forever scrambled the ocean’s biodiversity. By Stewart Edie, Smithsonian Institution June 10, 2025 ...