What can Galileo still teach us about science, truth, and discovery?

In this conversation, Mario Livio discusses Galileo’s scientific legacy, the Hubble Space Telescope, science denial, exoplanets, cosmology, and the future of life in the universe. Drawing from his book Galileo: And the Science Deniers, Livio explores Galileo’s role in the development of the scientific method and examines how scientific understanding evolves through observation, experimentation, and self-correction.

Mario Livio is an astrophysicist and author who worked for 24 years at the Space Telescope Science Institute, which operates the Hubble Space Telescope.

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How do natural laws shape human societies?

In this conversation, Saleem Ali discusses Earthly Order: How Natural Laws Define Human Life, exploring connections between natural systems, social organization, economics, and political order. Ali examines how concepts such as order, chaos, emergence, hierarchy, and complexity operate across scales—from physics and ecology to governance and global sustainability.

Saleem H. Ali is the Blue and Gold Distinguished Professor of Energy and the Environment at the University of Delaware. His research focuses on environmental conflicts, sustainability, natural resources, and ecological cooperation in international relations.

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What is “nothing”?

What does it mean for nothing to exist—or for nothing to have ever existed? In this episode, Robert Lawrence Kuhn explores one of philosophy’s deepest questions: Why is there something rather than nothing? Through conversations with philosophers and physicists, the discussion examines the nature of nothingness, whether absolute nothing is possible, and how different philosophical and scientific perspectives attempt to explain the existence of the universe.

Featuring Richard Swinburne, Simon Blackburn, Robert Spitzer, Peter van Inwagen, Steven Weinberg, John Leslie, Timothy O’Connor, Victor Stenger, John Hawthorne, and Peter Forrest.

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