We’ll look at the science of yoga with William Broad of the New York Times—from its many benefits to some dangerous. We’ll hear the story of the couple behind the landmark interracial marriage Supreme Court case Loving v. Virginia with the director of a new documentary. The BBC’s A History of the World in 100 Objects continues with a look at a tiny model of a chariot found in Tajikistan. Edward St. Aubyn tells about his latest novel, At Last. Plus, we’ll look at the contributions of American gay writers in the 20th century, including Gore Vidal, Tony Kushner, and others.