Science Friday Science Friday

Why physics and philosophy need each other

Sep 9, 2026 · 18m

Summary

Physicist and author Carlo Rovelli discusses his new book, *On the Equality of All Things*, exploring the deep connection between modern physics and philosophy. He argues that quantum mechanics and relativity have fundamentally shifted our understanding of reality, revealing that the universe is a network of relations rather than absolute objects. Rovelli explains how concepts like the relativity of simultaneity and the probabilistic nature of quantum mechanics challenge our intuitive perceptions of time and space. He also addresses the limitations of seeking a "theory of everything," sugge…

Topics discussed

Sponsors and show introduction Guest intro: Carlo Rovelli and his new book The historical dialogue between science and philosophy How quantum mechanics challenges classical intuition Is quantum mechanics too complex for laypeople? The role of philosophy in bridging scientific concepts Einstein's insight on the relativity of simultaneity Why Earth's smallness creates illusions about time The illusion of shared time and light speed A debate with a student on absolute vs relative motion Reality as a network of relations The impossibility of scientific certainty Against the search for a single fundamental foundation Why a 'Theory of Everything' is a flawed goal The failure of string theory and open questions Quantum gravity and the geometry of spacetime Loop quantum gravity and black hole research Finding peace in uncertainty and open questions Book promotion and closing remarks
Listen ad-free on Castria