PBS Space Time PBS Space Time

Do Black Holes Create New Universes?

Sep 14, 2026 · 24m

Summary

This episode explores Lee Smolin’s cosmological natural selection, a theory proposing that universes evolve through black holes to optimize star and black hole production. The host examines the plausibility of this model and its testable prediction that the strange quark mass should be tuned to allow neutron stars up to two solar masses to collapse, a limit recently challenged by a 2.17-solar-mass discovery. The discussion also addresses the "reference class" problem in anthropic reasoning, using the doomsday argument to illustrate the difficulty of defining our statistical position among a…

Topics discussed

Sponsor: LinkedIn Hiring Pro Sponsor: Gatorade Introduction to Cosmological Natural Selection The Mechanism: Black Holes and Universal Evolution Plausibility: Black Hole Bounces and Quantum Gravity Sponsor: LinkedIn Hiring Pro Sponsor: Gatorade Mutations in Fundamental Constants Testing the Theory: Stellar Optimization and Fine Tuning Alternative Black Hole Sources and Dark Energy Sponsor: LinkedIn Hiring Pro Sponsor: USAA Insurance Anthropic Principle Objections and Concrete Tests The Strange Quark Mass Prediction Critique: Correlation Between Life and Black Holes Sponsor: LinkedIn Hiring Pro Sponsor: Gatorade Value of Speculative Ideas and Sponsor: Brilliant Patreon Support and Viewer Shoutouts Viewer Q&A: The Doomsday Argument Reference Class Problems and Absurdities
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