The tree line, also known as the timberline ... "This discovery is very rare because the remains of this forest were trapped under a stationary ice mass, not under a moving glacier," he added.

An ancient fossilized forest in Montana is reemerging 600 feet higher than the present-day tree line after spending the last 5,500 years encased in alpine tundra. But as temperatures continue to ...

Trees dating back almost 6000 years have come to scientists' attention due to ice melting in the Rocky mountains, offering a "time capsule" into the past ...