Not only do our brains appear to generate new neurons into adulthood, but those of superagers contain far more brain cells in development than those of healthy peers, new research has found. According to a study of 38 adult human brains donated to science, superagers – people who retain exceptional memory as they age – have roughly twice as many immature neurons as their peers who age more typically. Moreover, people with Alzheimer's disease show a marked reduction in neurogenesis compared to a