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.

Leaves changing colors is one of the most iconic parts of autumn in the United States, and there's still time to catch stunning fall foliage before trees become totally bare leading into winter. But ...

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 ...

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 ...