This is the time of year when Nicole Hughes gets constantly distracted by the fall foliage as she drives around North Carolina. "I'm always looking," says Hughes, a biologist at High Point University.

Quiz: Can you identify this tree from its leaf? Do you think you have a good handle on identifying trees by merely looking at their leaves? Do you know the difference between coniferous and deciduous, ...

Leaves often turn brilliant colors in autumn. One of those colors has generated a lot of heated debate among scientists in recent years. Autumn is a big time for trees. Many shed their leaves, and of ...

If your tree is already turning its leaves for the fall, it's probably not the seasons, it's stress. The first day of fall isn't until Sept. 22, but some trees are already starting to show off their ...

Autumn is a big time for trees. Many shed their leaves, and of course, before the leaves fall, they can turn brilliant colors. One of those colors has generated a lot of heated debate among scientists ...