Known and Unknown

On today’s show: we’ll take a look at how your cell phone can be used as a tracking device and can reveal all kinds of information about you to corporations or to the government. Annie Baker talks about her much-praised adaptation of Chekhov’s “Uncle Vanya,” along with two of the production’s stars, Michael Shannon and Reed Birney. We’ll investigate the death of Yasir Arafat and whether he might have been poisoned with polonium. Plus, on Please Explain, physicists Brian Greene and Kyle Cranmer discuss why the discovery of the Higgs boson is so important!