[UPDATE -- 4 P.M. FRIDAY, JANUARY 14] Keeanga-Yamahtta Taylor, a professor of African American Studies at Princeton University who is among 2021 MacArthur “genius grant” winners, will deliver the keynote address for Duke University’s annual Martin Luther King Jr. commemoration at 3 p.m. on Sunday, Jan. 16. The threat of hazardous conditions Sunday from freezing rain forced the observance to move online. The commemoration will stream here.