To the Edge and Back

Scott Weidensaul has hiked through forests and swamps to bring back the dead  ? dead species, that is. He’s written a book on the search for extinct species, from the famed Ivory-billed to the secretive Semper’s Warbler. He talks with host Steve Curwood about his book “The Ghost with Trembling Wings: Science, Wishful Thinking, and the Search for Lost Species.”