Explore Einstein's general theory of relativity and its prediction of an expanding universe in this 48-minute video from the World Science Festival. Delve into the mathematical foundations and visual explanations of key concepts like the Big Bang, cosmic expansion, and the underlying equations that support these groundbreaking ideas. Learn about Georges Le Maitre's contributions, Einstein's initial response, and the basic mathematics of curvature and scale factors. Gain insights into the differential equations that describe cosmic evolution, all presented in a brief and accessible manner by Brian Greene. Discover how these pivotal equations and scientific stories can transform your understanding of the universe, even if your mathematical background is limited.