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Making America's Best Idea Even Better
Grand Teton National Park & John D. Rockefeller, Jr. Memorial ParkwayA concession wrangler speaking to visitors
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Grand Teton National Park & John D. Rockefeller, Jr. Memorial Parkway
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Aspen tree bark close-up  

Did You Know?
Did you know that the bark on Aspen trees looks green because it contains chlorophyll? Aspen bark is photosynthetic, a process that allows a plant to make energy from the sun, and helps the tree flourish during the short growing season.

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Last Updated: December 01, 2008 at 21:26 EST