In this Deep Dive episode, our hosts discuss how a landmark 1963 mass demonstration and symbolic timing shaped policy, infrastructure, and markets, the cultural and structural influence of figures born on this date, and the elegant biology of octopus circulation.

• 📜 On this day in 1963 roughly 200,000–250,000 people converged on Washington, D.C.; Jonathan and Ethan analyze the civic scale, the urban planning and transportation logistics required to move and manage that crowd, and the economic and policy implications when concentrated civic energy shifts public priorities and investor attention.
• 🎂 Birthdays: the hosts mark Johann Wolfgang von Goethe (1749), David Fincher (1962), and Shania Twain (1965), contrasting Goethe’s interdisciplinary cultural and scientific reach with Fincher’s influence on cinematic craft and Twain’s reshaping of pop-country markets, and reflecting on how cultural production intersects with economic structures and urban life.
• 💡 Fact of the day: octopuses have three hearts and blue blood — two hearts pump to the gills and one to the rest of the body; Jonathan and Ethan explore this division of labor as an engineering-efficient, resilient circulatory design and what that specialization implies about biological energy allocation and functional redundancy.

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