Saturday, September 22nd, Join Minute Man National Historical Park in a quest to discover Biodiversity! Challenge yourself to find as many species as possible at the park, work with distinguished naturalists in the field, and partake in real research used to better understand the area. Learn about plants, birds, mammals, insects, and how they all relate to biodiversity. All are welcome to help out from 8:00 a.m. to 4:00 p.m. at North Bridge Visitor Center, 174 Liberty St, Concord MA.