Brief outages are expected today due to maintenance. More information here.

Stream live and on-demand content now on our new app:
RMPBS+

Help tell more stories in 2026 - make a year-end gift!

Give Now
PBS Space Time show's poster

Is There a Simple Proof For a Vast Multiverse?

PBS Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth. Host Matt O'Dowd breaks down both the basic and incredibly complex sides of space and time.

Is There a Simple Proof For a Vast Multiverse?

Season 11 Episode 10 | 16m 18s | CC

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.

PBS Space Time

Watch more episodes

See more
See more