When we experience new information, our brains process and store the information as memories that we can recall later. Because our brains have a limited capacity, not all information will be stored for the long haul. And sleep plays a critical role in determining which memories stick around. A recent study published in Cortex, provides more evidence of sleep's involvement in memory. When we recall a memory, that memory is updated with the information present during remembering, creating a new version of the original memory. The act of remembering can overwrite the original memory, distorting it forever. Or the act of remembering can strengthen the original memory while also storing a new version that combines the original memory with a memory of remembering the original memory.