Into the Impossible With Brian Keating

Brian Greene: Does the Multiverse Actually Exist? (#369)

Nov 20, 2023
Renowned physicist Brian Greene discusses the experimental relevance of string theory and the exploration of the multiverse. Topics include alternative paths to Einstein's equations, Calabi-Yau manifolds in string theory, faster-than-light signals, the role of scientists as educators, UFO sightings, and the likelihood of alien life.
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ADVICE

Experimental Knowledge for Theorists

  • Theoretical physicists should know basic experimental results in cosmology, black holes, and particle physics.
  • This allows them to connect abstract math with the physical world.
INSIGHT

How Theorists Work

  • Theoretical physicists read papers to understand current research and generate new ideas based on others' work.
  • This process is often incremental and community-driven rather than solitary.
INSIGHT

String Theory's Strengths

  • String theory hasn't yielded experimentally testable predictions as quickly as hoped, but its theoretical power has been substantial.
  • Its connection with rigorously tested quantum field theory strengthens its relevance.
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