Paleontologists in southwestern China have unearthed fossils of *Dinocephalosaurus orientalis*, a 240-million-year-old marine ...

In the remote reaches of Arizona s Petrified Forest National Park, scientists have unearthed North America's oldest known pterosaur a small, gull-sized flier that once soared above Triassic ecosystems ...

Among these are the enigmatic "Mushroom" and the awe-inspiring "Sphinx." Rich in fossils, the valley offers a petrified ...