Brian Greene Sits Down with Leonard Susskind for a Conversation About the Mysteries of the Universe.

Why It Matters

Susskind’s framing—that black holes unify gravity and quantum mechanics—signals how modern theoretical physics is reshaping fundamental assumptions and guiding research directions like quantum gravity and holography, with implications for cosmology and the foundations of physics.

Summary

In a wide-ranging conversation, physicist Leonard Susskind told Brian Greene that gravity and quantum mechanics are not disparate regimes but deeply connected, with black holes providing the crucial laboratory where both scales converge. Susskind reflected on the role of intuition, confidence, and the iterative nature of being wrong as central to theoretical discovery. He reiterated his view that mathematics is discovered rather than invented—universal structures waiting to be learned. The discussion ranged from the origins of string theory to broader philosophical questions about reality and multiple selves, delivered with Susskind’s characteristic clarity and humor.

Original Description

This Friday, tune in to the World Science Festival YouTube as Brian Greene sits down with legendary physicist Leonard Susskind for a fascinating conversation about black holes, string theory, quantum mechanics, and the mysteries of the universe.