mu is a library of two-minute visualized micro-lessons on modern AI: LLMs, agents, RAG, reasoning models and more. Every lesson is a real animation rather than talked-over slides, and it ends with a quiz built around the mistake most people actually make. Paper Lab turns landmark AI papers into micro-courses. Lessons are curated by Ph.D.s from MIT and Purdue, new ones land every week, and the first lessons of every course are free. Works as an installable app with offline downloads.