“Glacial Goo” at Thacher Visitor Center. A Summer of Science program. Learn about how glaciers have affected the landscape here at Thacher Park. Appropriate for ages 9 and up. Call 518-872-1237 to register. Park entrance fee is $6 per vehicle. 10:00 a.m. at Thacher Visitor Center, John Boyd Thacher State Park, Voorheesville, NY