Support WBURWhen is forgetting normal — and when is it worrisome? A neuroscientist weighs inPlay36:28Download AudioTerry GrossFebruary 26, 2024 ShareCognitive neuroscientist Charan Ranganath says the human brain isn't programmed to remember everything. Rather, it's designed to "carry what we need and to deploy it rapidly when we need it." (iStock / Getty Images Plus)
