Show notes
What do physicists actually mean when they talk about the Multiverse? Sean Carroll explains.
The Multiverse is having a moment. From “Rick and Morty” to Marvel movies, the idea that our Universe is just one of many has inspired countless storylines in recent popular culture.
Why is the Multiverse so compelling? To theoretical physicist and philosopher Sean Carroll, one reason is that we’re drawn to wondering how things might have turned out differently. What if you had chosen a different career path? Married someone else? Moved to a different city?
Of course, there’s obviously no guarantee that you’re living out those alternate timelines in a different universe. But there are real scientific reasons to think that the Multiverse exists. And as Carroll explains, that possibility comes with some fascinating philosophical implications.
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0:00 Hollywood’s Multiverse
1:35 Physics’ Multiverse: Cosmology vs. Many Worlds
3:28 The Many Worlds theory
4:25 Are there many versions of you?
6:39 Your alternate lives
8:09 Your one life in our Universe
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About Sean Carroll:
Dr. Sean Carroll is Homewood Professor of Natural Philosophy — in effect, a joint appointment between physics and philosophy — at Johns Hopkins University in Baltimore, and fractal faculty at the Santa Fe Institute. Most of his career has been spent doing research on cosmology, field theory, and gravitation, looking at topics such as dark matter and dark energy, modified gravity, topological defects, extra dimensions, and violations of fundamental symmetries. These days, his focus has shifted to more foundational questions, both in quantum mechanics (origin of probability, emergence of space and time) and statistical mechanics (entropy and the arrow of time, emergence and causation, dynamics of complexity), bringing a more philosophical dimension to his work....
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