Continents were on the move in the Cretaceous, busy remodeling the shape and tone of life on Earth. At the start of the period, dinosaurs ruled the loosening remnants of the supercontinent Pangaea ...

The Cretaceous period was the last and longest segment of the Mesozoic era. It lasted approximately 79 million years, from the minor extinction event that closed the Jurassic period about 145 ...

This photograph of a Field Museum diorama of the ocean floor during the Cretaceous shows many free-swimming, complex organisms, including the large ammonoid ...

This allowed the scientists to create a timeline of nearly 2 million years at the end of the Cretaceous - with a resolution of 100,000 years - representing the period right before extinction.

In the late Cretaceous, dinosaurs ruled the earth. They were the most diverse and widespread land animals on the planet. “Most major terrestrial niches were occupied by dinosaurs, particularly toward ...

Geologists recently discovered the fossil of a Cretaceous-era mosasaur vertebra near Starkville, Mississippi. The experts believe the apex predator of the ancient seas could have weighed 20,000 ...