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# Is There a Simple Proof For a Vast Multiverse?
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/is-there-a-simple-proof-for-a-vast-multiverse-xsxrus/
- Published: 2025-11-12T22:30:50.000Z
- Updated: 2025-11-14T06:30:18.000Z
- Description: Is there evidence for the existence of an enormous number of other universes?
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 11, Episode 10, #ZZZ_Episode_1405b79b-7aca-499e-9e90-354ed93b120d, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

In 1987, Steven Weinberg wrote a cute little paper entitled “Anthropic Bound on the Cosmological Constant”. Weinberg was foundational in establishing the standard model of particle physics, but his little 1987 paper, though more obscure, may tell us something about how the multiverse works, and can even be thought of as evidence for the existence of an enormous number of other universes.