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 Originally Posted by boost
Hopefully this isn't too open ended, but can you tell me some cool things about the multiverse? It was touched upon on Sam Harris' podcast (Podcast: Waking Up with Sam Harris, Episode: The Multiverse & You (& You & You & You...) and now I can't stop thinking about it. Sometimes I'm using my absolutely and atrociously malnourished knowledge of how things work on the grand scale to try and wrap my head around the concept, and sometimes I'm just conjuring up silly and novel ever-so-slightly-alternate realities. Your insights on either or both are much appreciated.
Can you provide a link to the podcast?
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I don't know what physics has to say about a multiverse. Here's a brief explanation on why that may always be the case:
"Physics" is the current name of a field that Isaac Newton called "Natural Philosophy," or the philosophy of nature. It is the study of all physical (measurable) things. To wit, it deals with observable stuff and verifiable predictions about that stuff.
A basic physics definition of our Universe is "all that can (or ever could) be observed." So talking about any other universe is strictly talking about non-observable stuff, and therefore not physics.
Unless someone figures out an experiment to test for a multiverse, and that experiment is conclusive. Umm.. but then we've observed it, so is it really "another universe?" Or is it just another part of ours?
I really don't know. It's all semantics at that point, anyway.
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Which is why I need to listen to the podcast and see what language they're using and how rooted in physics it is.
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