The cooler temperatures shifted the tree line downslope and transformed the high mountain landscape from forest to the alpine tundra that exists today. One of the paper's authors, David McWethy ...

The cooler temperatures shifted the tree line downslope and transformed the high mountain landscape from forest to the alpine tundra that exists today. One of the paper’s authors, David McWethy ...

This transformed what was a high mountain tree-filled landscape into the alpine tundra there today. "We were very surprised that these mature forests were preserved for thousands of years," Dave ...

A melting ice patch in the Rocky Mountains uncovered an ancient forest, and these trees have stories to tell about dynamic ...