In an old-growth longleaf pine savanna, the trees’ pine needles sing in the ... Each of these forests has a unique ecology, but all are under threat from human activity and climate change.

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 ...

as is the case with the Methuselah Tree, a bristlecone pine more than 46 centuries old. But it's truly baffling to learn under what conditions it has accomplished this extraordinary feat.