Behind every autumn leaf lies a chemical shift-chlorophyll fading, carotenoids glowing, anthocyanins rising-that turns survival into spectacle. Every autumn, landscapes across much of the world ...

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.

Fall is here and leaves across Wisconsin are starting to turn hues of orange, yellow and red. But you might be wondering — why do some leaves change color in the fall? To get to the bottom of fall ...