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As sure as one falling leaf is followed by another, autumn always brings the same questions: What makes the trees turn color?
Kindergartners and city editors want to know, and so do garden club members and talk show hosts and homeowners fighting for their lawns against Mother Nature's relentless efforts to smother the grass beneath crimson maple leaves, brown oak leaves, and yellow elm leaves, among others.
So, recognizing that there is nothing like a long weekend of leaf raking to take the magic out of autumn foliage. the National Geographic Society hopes to brighten up the fall season with some answers.
Foliage changes color for a variety of reasons, but botanists, naturalists, and foresters are quick to push Jack Frost and his legendary paintbrush out of the tree.
Jack De-Frosted
Frost has little to do with the beautiful reds, browns, golds, oranges, scarlets, and yellows that start transforming America’s hardwoods in early September. In fad, frost and freeze that strike trees still green often kill the leaves, turning them
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