Multiple universes? How can scientists come to believe in more than one universe? The idea sounds astounding — our universe is immense by itself. But Raphael Bousso argues that the multiverse isn’t wild speculation. It’s the leading scientific direction for explaining why our universe’s laws appear fine-tuned for complexity and life. On a scale of 0 to 100, how convinced is he? He answers directly — and his answer surprises.
Raphael Bousso is a theoretical physicist and string theorist, and professor at the Department of Physics, UC Berkeley. He is known for the proposal of the holographic bound, also known as the covariant entropy bound.
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Closer To Truth, hosted by Robert Lawrence Kuhn and directed by Peter Getzels, presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.
#Multiverse #MultipleUniverses #Cosmology #StringTheory #PhilosophyOfPhysics
0:00 Do multiple universes surely exist?
0:35 Why physicists take the multiverse seriously
0:56 The fine-tuning problem — why our universe seems improbably tuned
1:44 What if there’s only one way to make the laws of physics?
2:38 The multiverse as a natural extension of known physics
2:48 The tank of water analogy — universes as different environments
3:35 How the early universe had different effective laws of physics
3:52 The Galileo parallel — the universe is always bigger than we thought
4:29 How to make predictions in a multiverse theory
5:00 On a scale of 0 to 100 — how convinced is Bousso?
5:21 Why Bousso prefers not to call it “multiple universes”
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