Where are the keys? What did I go into the kitchen for? Should I be worrying about my -- you know, that thing, memory? Or is this just what happens to everyone with age? Below are answers to common questions about memory loss, gleaned from interviews with three experts: neuroscientist James McGaugh of UC Irvine; Dr. Gary Small, director of the UCLA Memory Clinic and the UCLA Center on Aging; and Dr. William H. Thies, vice president of medical and scientific relations at the Alzheimer's Assn.