How can conifers that are used for example as Christmas trees keep their green needles over the boreal winter when most trees shed their leaves? Science has not provided a good answer to this question ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. To figure out what kind of tree you are trying to identify, take a look at ...

We’ve had a number of mysterious pine tree species in this column, and here is another. There’s always a new pine species to learn about; after all, there are about 100 species worldwide.