Matthaei Botanical Gardens & Nichols Arboretum hosts regular, free educational programs, workshops, and presentations on a variety of environmental, horticultural, and cultural topics. Tonight's presentation is by Garrett Johnson, who discusses the preservation successes of the Michigan Nature Association, its efforts to provide habitat for rare, threatened and endangered species, and the benefits to all of Michigan’s residents, including people, plants, and creatures. Presented by Sierra Club Huron Valley Group. Free.