The melting of glaciers in the Rocky Mountains led to a remarkable discovery: a 5,900-year-old whitebark pine forest ... is 180 meters above the current tree line. The tree line, also known ...

Though the tree ... pine forest, the story is the same. Drive through parts of Colorado, and you’ll encounter entire mountainsides painted with rust. From valley bottoms all the way to the tree ...

Less than 15 miles from the fire, the Ancient Bristlecone Pine Forest contains trees that are more than 4,000 years old. The Patriarch Tree is the world's largest bristlecone pine tree.