Just uploaded to my radio archives: December 3, 2011 Michael Dorsey, professor of environmental studies at Dartmouth, on the Durban climate summit • Bélen Fernández, author of The Imperial Messenger, on that egregious blowhard Thomas Friedman November 26, 2011 Greg Graffin, lead singer of Bad Religion and author of Anarchy Evolution, on evolution and punk rock • Jeffrey Sachs, the economist formerly known as Dr Shock, on the mess that is the USA, a topic he explores in The Price of Civilization (see my review of his last book here)