Season 6 of the Peabody Award-winning series "Art in the Twenty-First Century includes featured artists Marina Abramovic, Ai Weiwei, David Altmejd, El Anatsui, assume vivid astro focus, Lynda Benglis, Rackstraw Downes, Glenn Ligon, Robert Mangold, Catherine Opie, Mary Reid Kelley, Sarah Sze, and Tabaimo.