Researchers discovered more than 30 dead whitebark pine trees that were entombed in ice for millennia, representing a bygone ecosystem that could teach us about climate change

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

Ancient forest preserved under ice on the Beartooth Plateau provides a rare look into how warming climates could reshape alpine ecosystems.