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Why the 'no-boundary' universe remains unresolved even decades after Hawking
A new review of the Hartle-Hawking no-boundary proposal argues that the idea remains conceptually attractive but still faces major obstacles, from the lack of a working theory of quantum gravity to predictions that do
Key Takeaways
- The no-boundary proposal still lacks support from a finished theory of quantum gravity.
- The model’s most probable universe appears somewhat smaller and less inflationary than the observed cosmos.
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DT Editorial Team··via universetoday.com