Green Mountain Academy for Lifelong Learning (GMALL) is happy to welcome back Dr. John Delano to talk about stone walls. New York and New England contain nearly 200,000 miles of stone walls that were built by 18th-19th century farmers. With the abandonment of thousands of farms in the mid-19th century and the fields being reclaimed by forests, most of those walls are now located in the woods. Dr. Delano measured nearly 1,000 miles of stone walls using LiDAR (Light Detection and Ranging), principally in New York State and New Hampshire, and has published the results in the peer-reviewed, professional journal, Journal of Geophysical Research. In combination with ancestral information, these old stone walls provide an enduring legacy of subsistence farmers and their struggles for survival in a harsh climate. Registration for the talk is $22 per person. For more information or to register, please call 802-867-0111 or visit our website at greenmtnacademy.org.