MSU ecology professor Jeremy Hartsock leads a hike to learn the basics of moss and liverwort field identification using a hand lens and patterns of moss ecology. 2–3:30 p.m., Eddy Discovery Center, 17030 Bush, Chelsea. $2 (families, $5); preregistration required at [email protected] (include name, phone number, and number of attendees). $15 Michigan recreation passport ($20 at the gate) required.