Each fall season brings an explosion of red, purple, orange and yellow colored leaves. How do these changes occur, why does it vary tree to tree and year to year, and how do they relate to a tree’s growth? John O’Keefe, coordinator of the Fisher Museum at the Harvard Forest, has spent the last 18 years observing trees and leaves. He’ll explore these questions and present real tree core samples to show what tree rings can tell us about the environment and a tree’s history—and what changes the future might hold for our forests. Free with museum admission.

For more information call 617-495-3045.

Registration required:

No

Free:

No