Each fall, green leaves transform into the reds, yellows, and oranges of the season. But, why? Here's what to know.

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.

With the middle of the fall season nearing, leaves in most U.S. states have begun to change colors, wowing leaf-peepers with the orange, red, brown, and sometimes purple hues of autumn. These changes ...

Vibrant leaf colors are synonymous with the fall season, marking the transition from summer's greenery to a palette of reds, oranges, and yellows. According to the live map from Explore Fall, states ...

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