The beetle penetrates the tree bark, causing its sap to stop flowing. From there, green pine needles turn orange, and the ...

Sparse ground cover means the threat of fire is greatly reduced, a danger further lessened by the relative paucity of dead bristlecone needles in a landscape where trees ... pine is but 60 feet ...

which historically was one of the tallest trees in the eastern United States. This conifer is the only five-needled pine native to Indiana, meaning that the bundles of needles coming off the branches ...

Old-growth forests are rare – less than 7% of the area of U.S. forests today – and are still often logged. To recover forest ecosystems across the U.S., it will not be enough to protect just ...