작업기억, 단기기억사람이 한 순간에 다룰 수 있는 개념의 수로, 개념을 추상화하고 묶어서 다룰수록 그 크기가 늘어남Working memory Notionklotho injection of klotho improves working memoryOne shot of a kidney protein gave monkeys a brain boostAn early experiment suggests that an injection of klotho improves working memory.https://arstechnica.com/science/2023/07/one-shot-of-a-kidney-protein-gave-monkeys-a-brain-boost/