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.

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

A site in the San Juan Basin of northwestern New Mexico is providing a rare glimpse into the last days of the dinosaurs. Rocks and fossils at the Naashoibito Member site show an ecosystem that was ...

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 ...

When most people think of massive snakes, the first one that comes to mind is the anaconda. Anacondas might be the largest ...

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

Researchers suggest that ground-based mammals fared better than their arboreal relatives during the end-Cretaceous extinction thanks to their lifestyle. Reading time 2 minutes The end-Cretaceous ...

The Cretaceous–Paleogene (K–Pg) mass extinction event, marking the boundary between the Cretaceous and Paleogene periods approximately 66 million years ago, stands as one of the most profound ...

Sixty-six million years ago, at the end of the Cretaceous Period, an asteroid impact near the Yucatán Peninsula of Mexico triggered the extinction of all known non-bird dinosaurs. But for the early ...