When the air becomes crisp and the leaves start to turn, it only means one thing: Fall has arrived! Don't get us wrong, we love the bright green hues that grace the treetops throughout the spring and ...

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 ...

I had written an article on leaves during a series on plants. I wrote about the green called chlorophyll. Green is the color of life, nature, health and prosperity. It is hope in the spring; the ...

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 have long questioned whether the vibrant colors of fall foliage serve an evolutionary purpose. One theory suggests red pigments protect leaves from sun damage, allowing trees to absorb more ...

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 ...