Mark Hollabaugh talks about his new book, "The Spirit and the Sky: Lakota Visions of the Cosmos"

Mark Hollabaugh has written a very interesting book about the role and significance of astronomy in Lakota culture, "The Spirit in the Sky: Lakota Visions of the Cosmos." Dave read the book and chatted with Mark about it during membership drive. Mark is an emeritus instructor of physics and astronomy at Normandale Community College, and a part-time Cook County resident.