Physicists and astronomers at the University of Nottingham sit down on camera to explain the equations and symbols behind their fields, one at a time, in a series that now runs to hundreds of short videos despite the name. A professor breaks down the physics of a swinging cricket ball, another demonstrates why paper clips behave oddly when stuffed into a coffee cup, and the crew travels to China to film a total solar eclipse with astronomer Amanda Bauer, capturing the trip in raw behind-the-scenes footage as well as the finished piece. There are no scripts or lecture halls: each episode is a conversation, usually shot at a whiteboard or in a lab, where the scientist works through the idea in real time rather than reciting it. When an existing symbol cannot carry a topic, the presenters invent one on the spot. The result is less a structured course than a running log of working physicists thinking aloud about what interests them that week.