Most of us probably think about memories as being about the past. But when memories are gone, it becomes clear just how much they are also about the future. This week we are in search of lost memories. We'll speak with Michael McCloskey about how memories are formed and how you test for memory in people with amnesia. We'll also talk with Michael Lemonick about his new book, The Perpetual Now: A Story of Memory, Amnesia and Love", and the story of Lonnie Sue Johnson and her memory loss. This episode is hosted by Bethany Brookshire, science writer from Science...