There's a chestnut tree in a nature reserve in Duesseldorf, Germany, and it has a mailbox. People have sent it 5,500 letters and postcards since 2007. The nearly 200-year-old chestnut tree in ...

We visit an orchard where researchers are breeding Chestnut trees they hope will one day fight off a fungus that's been killing the iconic American tree for more than a century. And now a checkup of ...

And now a checkup of sorts on the American chestnut, a tree that was a big part of forests in the eastern United States until 1904, when a fungus from Asia started killing them. Since the 1920s, ...