 And from Luminescence Foundation, dedicated to shedding light on neurological research focused on Alzheimer's and Parkinson's diseases and supporting land conservation initiatives. I'm Tom Streckel. I hope you're enjoying Weekend Edition here on KUNR on this Sunday morning. There's another hour coming up following NPR News headlines. On the next Radiolab. I wanted to conquer the diseases of children. The story of a man who completely altered the course of human health.