What does it actually take to understand the universe at its deepest level, and what happens when the rules that govern it seem to contradict each other?
Theoretical physicist Leonard Susskind joins Brian Greene for a conversation on black holes, the nature of reality, and what it means to spend a lifetime chasing the hardest questions in physics. Together they trace the ideas that have defined Susskind's career, from a Bronx childhood and early years as a plumber, to his decades-long battle with Stephen Hawking over whether information can ever truly be lost inside a black hole, and the idea that the universe itself might work like a hologram.
Susskind and Greene also push into the messier, more human side of science that rarely makes it into textbooks. They discuss questions about why the biggest breakthroughs tend to start where two things that both seem true turn out to be impossible to reconcile, why being wrong never scared Susskind, and what it actually feels like to hold a conviction your entire field thinks is crazy. They take on the harder questions surrounding string theory like what it has and hasn't delivered, why experiments have gotten so difficult they now resemble building cathedrals, and whether a theory that hasn't made a confirmed prediction is still worth pursuing. It's a conversation with one of the most original thinkers in modern physics, and a reminder that the ideas that sound the craziest sometimes end up changing everything.
This program is part of the Rethinking Reality series, supported by the John Templeton Foundation.
Participant: Leonard Susskind
Moderator: Brian Greene
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Chapters:
00:00 Introduction to The Physicist Who Helped Build String Theory
01:48 From Plumbing In The Bronx To Physics
04:42 The Moment Einstein Changed Everything
05:27 Why Engineering Almost Made Him Quit Science
06:34 The Professor Who Changed His Entire Life
07:48 Why Susskind Chases Big Questions Instead Of Calculations
09:04 The Physics Conflicts That Started Everything
09:46 Intuition Vs Mathematics In Science
10:53 Why Being Wrong Is Part Of Discovery
12:24 The Human Side Of Physics Nobody Talks About
13:49 Why Einstein Rejected Black Holes
16:07 Hawking’s Theory That Information Disappears Forever
17:39 The Fight Between Quantum Physics And Black Holes
19:57 The Birth Of The Holographic Principle
22:23 The Weird Hologram Story That Changed Physics
24:02 Why Scientists Thought Susskind Lost His Mind
25:38 How The Holographic Principle Took Over Physics
32:08 The Conflict That Created String Theory
34:49 How Vibrating Strings Changed Physics Forever
39:17 Why Quantum Gravity Refused To Work
42:23 Why Physicists Thought They Found The Final Theory
45:39 The Problem With Supersymmetry
51:02 Why Modern Physics Became So Hard To Test
55:32 Are There Infinite Universes Out There?
57:11 Why Physics Is Ultimately Just Fun For Susskind
The Hardest Questions in Physics | World Science Festival
https://www.youtube.com/channel/UCShHFwKyhcDo3g7hr4f1R8A 
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