circlesintime.substack.com]]>https://circlesintime.substack.com/podcastSubstackSat, 11 Jul 2026 12:55:58 GMThttps://api.substack.com/feed/podcast/19830.rssDavid PerrottA two-week course in self-applied behavioural science, systems design and self-experimentation.episodicDavid Perrottcirclesintime@substack.comNo