This story was originally published on The Conversation and appears here under a Creative Commons license. On a crisp autumn morning in 1908, an elegantly dressed African American man strode back and forth among the pin oaks, magnolias, and silver maples of O’Fallon Park in St. Louis, Missouri. After placing a dozen dishes filled with strawberry jam atop several picnic tables, biologist Charles Henry Turner retreated to a nearby bench, notebook and pencil at the ready. Following a midmorning break for tea and toast (topped with strawberry jam, of course),…
