An Evolution

On today’s show: Jamie Fellner, of Human Rights Watch, talks about a new report on the soaring number of aging prisoners in the United States. Acclaimed Chinese dancer Jin Xing discusses her performance at the Joyce Theater and her first appearance in New York dancing as a woman. A History of the World in 100 Objects continues with a look at the Rhind mathematical papyrus. Adam Johnson talks about his latest novel, The Orphan Master’s Son. Plus, two biographers turn their attention to the evolution of the term “addiction.”