This piece first appeared in the Front Matter section of the Proceedings of the National Academy of Sciences. A small but fierce jawbone sits in Argentina’s natural science museum in Buenos Aires. Six ...

May 28 (Reuters) - Tyrannosaurus rex was a huge land predator during the twilight of the age of dinosaurs. But it was not the only T. rex that terrorized the Cretaceous Period. There also was a marine ...

In biology and paleontology (the study of extinct organisms) there are a few ways to estimate the age of an animal's skeleton. One is the extent of fusion of sutures in the skeleton—how much the ...

Around 250 million years ago, what is today scorching desert in remote northwestern Australia was the shore of a shallow bay bordering a vast prehistoric ocean. Fossils recovered from this region over ...

Earliest oceanic tetrapod ecosystem from 249 million years ago. A pod of the small-bodied ichthyopterygian ('fish-lizard') Grippia longirostris hunting squid-like ammonoids (centre). A school of the ...

Unlike most modern mammals, which get just two sets of teeth in their lifetime, an ancient species from the Cretaceous, found ...

Fearsome Dinosaur-Era Marine Reptile Was the T. Rex of the Sea By Will Dunham May 28 (Reuters) - Tyrannosaurus rex was a huge land predator during the twilight of ⁠the ⁠age of dinosaurs. But it was ...

Crocodile bones shed light on growth dynamics. Anusuya Chinsamy-Turan In biology and palaeontology (the study of extinct organisms) there are a few ways to estimate the age of an animal’s skeleton.