Scientists believe that this aquatic dinosaur was the largest predator to ever roam the planet. | National Geographic

A newfound fossil tail is changing what we know about Spinosaurus—and stretching our understanding of how and where dinosaurs lived. For more iconic storytelling like this, subscribe to National Geographic: https://on.natgeo.com/3aJdDvL | National Geographic

Spinosaurus has made history as the first known swimming dinosaur. In our story—with exclusive photos—we detail how a newfound fossil tail is changing what we know about how and where dinosaurs lived. For more historic stories like this, subscribe to National Geographic: https://on.natgeo.com/2YhJYHJ | National Geographic History