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 ...

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

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. Roughly 75% of all species vanished, including every non ...

The highest trophic niches in Mesozoic oceans were filled by diverse marine reptiles, including ichthyosaurians, plesiosaurians, and thalattosuchians, dominating food webs during the Jurassic and ...

New dates for a long-debated New Mexico fossil site reveal that dinosaurs were thriving and regionally diverse until the end-Cretaceous asteroid strike 66 million years ago, according to a new study.

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

The Late Cretaceous modern (crown) bird,Vegavis iaai, pursuit diving for fish in the shallow ocean off the coast of the Antarctic peninsula, with ammonites and plesiosaurs forcompany. Sixty-six ...