While it’s easy to spend just an hour driving the 28-mile (40-kilometer) road through Petrified Forest National Park in ...

The American West is renowned for dinosaur discoveries. But what about the Grand Canyon? The park was once home to some weird ...

The current 346 square miles of Petrified Forest open a window on an environment more than 200 million years old, one radically different from today's grassland. Where you now see ravens soaring ...