 They're looking at nuns there who have donated their brain to science. This is an incredible story every time you tell it. Every time that I, and it just tracks everything we talk about happiness and it relates to that. So nuns have donated their brain to science. And when they die, they dissect their brain. Oh my God, this nun has got plaques and tangles that tell little signs of Alzheimer's. Then they look at the diary and say, how was this nun doing when she was living? And she was running like an energizer bunny. I mean, it was asymptomatic Alzheimer's. There were no signs of Alzheimer's.