By analyzing the density of bones of several spinosaurid dinosaurs and comparing them to other animals like penguins, hippos, and alligators, Field Museum of Natural History paleontologist Matteo Fabbri and his colleagues found that Spinosaurus and its close relative Baryonyx both had dense bones that would have allowed them to submerge themselves underwater to hunt. Spinosaurus aegyptiacus. Image credit: Davide Bonadonna. “The fossil record is...
