Those Brilliant Fall Outfits May Be Saving Trees October 19, 2004 By CARL ZIMMER.
As trees across the northern United States turn gold and crimson, scientists are debating exactly what those colors are for.
http://www.nytimes.com/2004/10/19/science/19leaf.html?ex=1099192170&ei=1&en=082e779da67c279e
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