Geologists near Starkville found a bone of a Mosasaurus hoffmannii, one of the biggest species of mosasaurs, which could reach lengths of 50 feet.

The creatures cruised the world’s oceans with features we often associate with marine mammals, such as coats of blubber and ...

A new study reveals that a prehistoric sea cow was preyed upon by two different carnivores: a crocodile and a shark.

Dinosaur extinction theories suggest populations were dwindling when an asteroid wiped them out. New research is challenging ...

An analysis of North America’s fossil record for the 18 million years before dinosaurs disappeared suggests the prehistoric ...

Despite previous research, Earth's long-gone mega-reptiles probably weren't dying off before an impact winter did them in for ...

A new study found dinosaurs were thriving on Earth before asteroid hit, challenging idea they were already in decline before ...

The study looked at the dinosaur groups Ankylosauridae (armoured herbivores), Ceratopsidae (large three-horned herbivores, ...

The idea that dinosaurs were already in decline before an asteroid wiped most of them out 66 million years ago may be explained by a worsening fossil record from that time rather than a genuine ...

caused by geological changes in these terminal Mesozoic fossil-bearing layers - driven by processes such as tectonics, mountain uplift, and sea-level retreat - rather than genuine fluctuations in ...