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 ...

Paleontologists analyzed the photo and determined that the remains were an undocumented Cretaceous species ... providing ...

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 ...

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 ...

Some 66 million years after the Chicxulub asteroid impact kickstarted the Cretaceous–Paleogene (K ... of the study were published in the journal Marine Geology. “The megaripples are different ...