On Time, Leibniz, Mach and the Foundations of Physics

In this engaging lecture and Q&A session, renowned physicist Julian Barbour discusses his views on the nature of time, drawing inspiration from Leibniz's philosophy and the history of physics. Barbour explores the concept of "snapshots" of the universe, the development of dynamics from ancient astronomy to Newton, and recent discoveries in the n-body problem. He challenges conventional notions of time and space, proposing alternative interpretations of physical theories and their implications for our understanding of the universe. The discussion touches on topics such as the relationship between classical and quantum mechanics, the potential alternatives to inflationary cosmology, and the fundamental role of variety and structure in physics.