Every time you remember something, you're not playing back a recording — you're reconstructing it live, and in doing so, you subtly rewrite it. Scientists discovered in the early 2000s that the very act of recalling a memory makes it briefly unstable and editable, which means your most vivid, certain memories may be your least reliable ones. This episode gets into the neuroscience of why memory works this way, what it means for eyewitness testimony and trauma therapy, and the quietly unsettling question of whether any of your past is actually yours.