3 min read Continents were on the move in the Cretaceous, busy remodeling the shape and tone of life on Earth ... long-necked and toothy marine reptiles terrorized fish, ammonites, and mollusks ...

However, the Cretaceous–Paleogene ... became completely devoid of animal life. The eventual tropical dead zone impacted the distributions of both marine and terrestrial organisms throughout ...

The plant life of the Cretaceous was quite different to that of today ... In the seas, there were mosasaurs, which are big marine reptiles, and there were groups of plesiosaurs and ichthyosaurs,' ...

The oceans also teemed with life, including some monstrous ... deep into one intriguing ecosystem from the early Cretaceous, where bus-length marine reptiles like pliosaurs preyed on other large ...

A study by McGill University on a Cretaceous marine ecosystem reveals that the predators at the top of the food chain 130 million years ago exerted a dominance unmatched by modern species. The study, ...

eliminated the majority of life on Earth). For most of the Cretaceous, Canada’s prairie provinces were sitting deep underwater. A giant inland sea cut right across North America. Known as the ...