Big Think

Brian Cox: Why even Einstein doubted the existence of black holes

Oct 7, 2025
Join renowned physicist Brian Cox as he delves into the enigmatic world of black holes, exploring their role at the intersection of relativity and quantum theory. Cox traces the fascinating history from 18th-century concepts of 'dark stars' to modern debates on black hole formation. He unpacks the implications of event horizons, time dilation, and the singularity, revealing the mind-bending idea of Hawking radiation. Discover why even Einstein had doubts and how these cosmic giants challenge our understanding of reality itself.
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INSIGHT

Black Holes Force Theory Unification

  • Black holes demand we combine quantum theory and general relativity to progress beyond current physics.
  • They provide a unique natural laboratory for a quantum theory of gravity.
ANECDOTE

18th-Century 'Dark Stars' Prediction

  • Mitchell and Laplace independently imagined 'dark stars' whose escape velocity exceeded light speed in the 18th century.
  • Their Newtonian idea foreshadowed modern black holes but missed relativistic subtleties.
INSIGHT

Schwarzschild's Solution Underpins Black Holes

  • Schwarzschild found an exact solution to Einstein's equations that models the simplest black hole.
  • That solution describes the distorted spacetime left behind and forms the theoretical basis for modern black holes.
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