A variety of red oak leaves show how different layers of the tree canopy can develop at different times, with the outer layer usually changing first. DURHAM, N.H.—Fall is in the air and thoughts turn ...

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.

Scientists know why leaves turn yellow in the fall: Chlorophyll breaks down, revealing the yellow pigment that was there all along. But red? Red is a different story altogether. Leaves have to make a ...

Scientists are investigating the reasons some plants still wear last season’s tattered clothes.

One thing that makes living in South Carolina as sweet as a cup of tea is being able to experience the four seasons. Although the summers may be brutal, residents can always look forward to a cool ...

The red pigments in some fall leaves have proven to be a puzzle for researchers who debate why leaves bother to go red. Why do only some leaves turn red in the fall? Scientists can't agree on an ...

Scientists know why leaves turn yellow in the fall: Chlorophyll breaks down, revealing the yellow pigment that was there all along. But red? Red... Fall foliage is still a mystery: Why do some leaves ...

Fall is in the air and thoughts turn to pumpkins, cider and brightly colored leaves. According to experts at the University of New Hampshire's Extension, despite drought conditions in the Northeast, ...