Talk by Jeffrey Holden about his book chronicling his experience leading week-long backpacking expeditions to search for dead moose on Isle Royale. Scientists use the bones, photos, and data to reconstruct the moose population through the years. Q&A. 7 p.m., U-M Matthaei Botanical Gardens Auditorium, 1800 N. Dixboro Rd. Free; metered parking. michiganbotanicalsociety.org/huron-valley-chapter.