
World’s longest predatory dinosaur used its tail to swim
April 29 (UPI) -- Paleontologists finally have proof that some dinosaurs were aquatic. Detailed analysis of the only existing Spinosaurus aegyptiacus remains suggests the world's longest predatory dinosaur lived in a large river system and used its tail to swim. The discovery -- published this week in the journal Nature -- marks the first time a tail-propelled swimming locomotion has been reported in a dinosaur. "This discovery really opens our eyes to this whole new world of possibilities for dinosaurs," lead study author Nizar Ibrahim, professor at the University of Detroit Mercy, said in a news release. "It doesn't just add to an existing narrative, it starts a whole new narrative and drastically changes things in terms of what we know dinosaurs could actually do. There's nothing like...