““So couples relive romantic memories, families watch home movies, and friends "catch up" with each other, as if they've lagged behind on a trail. Sifting memory for saliences to report, they reveal how vital pieces of their identity have changed. Aging, we tailor memories to fit our evolving silhouette, and as life's vocabulary changes, memories change to fathom the new order. Lose your memory, and you may drift in an alien world.””