Paleontologist Paul Sereno and an international team have named a new species of sail-backed predator, Spinosaurus mirabilis, from fossils pulled out of remote desert outcrops in Niger. The animal ...

The largest predatory dinosaur to ever walk on Earth sported a massive sail that rose from its back, but it turns out this imposing creature would have made for a very slow and awkward swimmer, ...

With an incredible sail and heavy bones that might have acted as ballast, Spinosaurus seems primed for snatching fish. The creature has long captivated the public, from its early mysteries to the ...