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 ...

The remains of an ancient forest have been discovered in a popular hiking area of the Rocky Mountains. Surrounded by backcountry hiking trails, the Beartooth plateau is a frozen tundra that sits ...

A team of scientists from Montana State University, the U.S. Geological Survey and collaborating institutions discovered the ancient whitebark pine forest while on an archeological survey on the ...