For much of the 20th century, the consensus was that our memories are fixed and stored in the brain as literal recordings of past events. Modern research, however, has given us a better understanding. Memories constantly change. They expand, shrink, and expand again. Our memories can also be manipulated and altered by suggestion. KCRW learns about the failings and malleability of memory, and the controversy when it comes to witness testimony in court. We also learn how nostalgic memories can help us cope in difficult times.