Nature: Autumn leaves?
"How does autumn color happen? ... For years, scientists have worked to understand the changes that happen to trees and shrubs in the autumn. Although we don't know all the details, we do know enough to explain the basics and help you to enjoy more fully Nature's multicolored autumn farewell. Three factors influence autumn leaf color... " -- from the website. <http://www.na.fs.fed.us/spfo/pubs/misc/leaves/leaves.htm>
<< Home