Prelude: Cosmos and Humanity Revisited

Part I: Reflections on a Changing World

Part II: The Power and Beauty of Science

Part III: Environmental Challenges and Possible Solutions

Part IV: The Dangers and Promises of Technology

Part V: Probing the Universe: Past, Present, and Future

Part VI: Personal Reflections and Perspectives on Life and Death

Epilogue: Framing the Future - Thoughts on the Next Millennium

In 'Billions & Billions: Thoughts on Life and Death at the Brink of the Millennium', Carl Sagan explores a myriad of topics, from global warming to the meaning of life. His profound insights and lucid explanations offer a deeply engaging perspective on the world and cosmos.