Spinosaurus aegyptiacus, a sail-backed theropod dinosaur that lived in what is now North Africa during the Cretaceous period, about 95 million years ago, was unstable in deeper water with little ability to right itself, swim, or maneuver underwater. Spinosaurus aegyptiacus was adapted for hunting along shorelines instead of venturing deep underwater. Image credit: James Gurney. In 1915, the German paleontologist Ernst von Stromer announced the discovery...
