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Scientifically, the shorter daytime hours and cooler temperatures create a complex chemical reaction in leaves and plants, causing the quiet green colors of summer foliage to transformed into reds, oranges, golds and browns before the leaves fall off the trees.
Here is a Soundslides file providing a few glimpses of fall colors on the WSU Pullman campus over the past two weeks, courtesy of WSU Photo Services.
Photos by Shelly Hanks and Robert Hubner, WSU Photo Services
Music: “Autumn Day,” by Peter White, from his alumn “Perfect Moment”
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