Mike Ehrmann/Getty Images Last year, ground-penetrating radar revealed that a purportedly empty cemetery in Clearwater, Florida, might not actually be empty. To longtime residents of the area, it wasn’t exactly news. As Smithsonianreports, the North Greenwood Cemetery opened in 1940 and provided burial plots for members of Clearwater’s Black community until 1954, when the city decided to build a high school and a pool on the land instead. Officials relocated 350 graves several miles north, to Parklawn Memorial Cemetery, but some locals maintained that unmarked graves were never exhumed. ...