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Was This Dinosaur More Subaquatic Killer or Giant Wading Bird? A new study challenges the hypothesis that spinosaurus pursued its prey in the currents of prehistoric rivers. A life reconstruction of spinosaurus foraging in water.Credit...Bob Nicholls By Asher Elbein Jan. 26, 2021 Ninety-nine million years ago, a 55-foot dinosaur stalked the river deltas of North Africa. A sail on its back towered over the water as its crocodile-like jaws and curved claws made short work of car-size fish. This was Spinosaurus, discovered in 1915. Paleontologists have since debated how this creature lived. Did ...

Pterosaurs were highly successful reptiles that lived between 210 and 65 million years ago. They were the first vertebrates to evolve powered flight, but their origin has remained an unresolved enigma in paleontology since the 19th century. With the help of pterosaur skulls and skeletons that were unearthed in North America, Brazil, Argentina, and Madagascar in recent years, a team of paleontologists has now demonstrated that flightless dinosaur precursors called lagerpetids (family Lagerpetidae) are the sister group of pterosaurs. Ixalerpeton, a species of lagerpetid that lived in what is no...