Early ammonites had simple suture lines traced across their shells, while the sutures on species from the Cretaceous period (145 to 66 million years ago) formed intricate patterns that may have ...

Tyrannosaurus Rex Tyrannosaurus rex arose during the Cretaceous period about 85 million years ago, and thrived as a top land ...

Most ammonites died out at the same time as the non-avian dinosaurs, at the end of the Cretaceous Period, 66 million years ago. Zoë says, 'We didn't quite lose all of them at the end of the Cretaceous ...

Nipponites mirabilis are some of the most unusual-looking ammonites. Another heteromorphic species, fossils have been found in rocks that date to the Late Cretaceous in Japan. The unusual alternating ...

Exquisitely preserved fossils of a shark that thrived during the Cretaceous period appear to ... such as large ammonites and sea turtles.” While the individuals they studied are small, at ...

"From ammonites to bivalves, these ancient marine creatures reveal secrets from the Lower Cretaceous Period." Despite the boreholes being 102mm (four inches) in diameter, a few intact and well ...