How It Ends - What We Know about the Fate of the Universe

Explore the ultimate fate of the universe in this comprehensive lecture that examines cosmological predictions about how everything will end. Begin by confronting the paradox of modern cosmology, where our successful models describe a universe composed of 95% dark matter and dark energy that remain poorly understood. Journey through the life and death of the Sun before expanding to understand the universe's future through the lens of cosmic expansion discovery and various theoretical models including the Big Bang, Big Crunch scenarios. Examine why entropy prevents the universe from rebounding and learn about methods for measuring cosmic fate through observations of stars, black holes, and the eventual death of light itself. Investigate dark energy's role in accelerating universal expansion and consider far-future scenarios including the Big Rip theory versus eternal expansion possibilities. Contemplate whether new universes could emerge from cosmic endings, connecting the universe's ultimate fate to its mysterious beginnings. Gain insights into cutting-edge astrophysical research that spans the next 100 billion years while grappling with fundamental questions about cosmic destiny, delivered by a leading Oxford astrophysicist who combines rigorous scientific analysis with accessible explanations of humanity's most profound cosmological questions.