Is It a Disease or a Symptom of Aging?

Allan: I didn't know he had something to say on sleep. He did. And it turns out that he was right. Most of what happens in our brain, not only, and there's a lot of reasons to sleep, is to basically trim down our memories,. To mow the lawn of memor so we wake up the following day with a clean slate. The idea that we need remembering, we need forgetting. We have to hit the right balance between the two.