A massive sinkhole in China, home to an ancient forest, could harbour species yet ... and bottles of God-knows-what out of the active cave stream." ...

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 ...

Nearly half of the entire state of Oregon is covered in trees, and one of the oldest forests is hiding from plain sight in an ...