Paleontologists have discovered the fossilized remains of a crocodile "hypercarnivore" that lived in what is now Argentina some 70 million years ago—and it ate dinosaurs. Named Kostensuchus atrox, the species lived during the Maastrichtian age at the very end of the Cretaceous period, just before the extinction of the dinosaurs.

A fossil found in Argentina shows that up to the very end of the age of dinosaurs, they faced serious competition from other reptile species.

Scientists have discovered a remarkably well-preserved skeleton of a new 3.5-meter-long reptile with sharp, blade-like teeth and a skull built for crushing. It belonged to a now-extinct group of crocodile relatives called peirosaurids, and the find is reshaping what we know about top predators in South America at the end of the Cretaceous.