On the program, 350.org activist and renown environmentalist Bill McKibben (@billmckibben). Check out his latest book Eaarth: Making a life on a Tough New Planet. Also, Dave Zirin (@EdgeofSports), columnist and sports editor for the Nation, on the collision of politics and sports. The John Carlos Story: the Sports Moment that Changed the World is his latest book. And some incredible images provided by listener (and hobbyist ham operator) John, commemorative Voyager Cards sent to him by the JPL Amateur Radio Club. Click thru to check them out, for other links and for show updates.