Part two of the BBC documentary, "America: Laboratory of Democracy." This hour explores the history of uprisings and insurgencies in the United States.
Norman Lear and Khizr Khan speak at the Aspen Ideas Festival about the American values embodied in the Constitution and the Declaration of Independence.
Former NPR host Michele Norris moderated a discussion about race, inequality and the future of democracy at this summer's Aspen Ideas Festival. Is opportunity and social mobility still possible in America?
Bill Bishop says some of our political polarization comes from the fact that we're ideologically inbred -- we don't know, can't understand and can barely conceive of people who live just a few miles away.
For the winter solstice, "Tick, Tock, Circadian Clock." Host Molly Bloom explores circadian rhythms, animal hibernation, the ticking clock inside us all and how light and dark affect all life on Earth.