For today's show we're replaying some favorite interviews from the past few months. Tim Flannery gives us a history of planet earth—from its origins as a galactic cloud of dust to the rise of us, Homo sapiens. Diane Ackerman talks about her husband Paul West’s debilitating stroke and road to recovery. Environmental writer Eugene Linden tells us about the few remaining indigenous cultures that have refused to join the modern world. And Sarah Vowell describes the Americanization of Hawaii in the late 19th century.