RE: Why I don't believe in parallel universes
March 24, 2015 at 1:29 pm
(This post was last modified: March 24, 2015 at 1:33 pm by Alex K.)
(March 24, 2015 at 1:24 pm)downbeatplumb Wrote: I am not really up enough on the concept of multiple universes to comment fully but have heard that it could explain why gravity is so weak and seems to be not ruled out by physicists.
It can never be completely ruled out if you accept to stretch your expectation how much of the weakness of gravity the model should be able to explain.
These models have already been constrained by the first run of the LHC in how big the extra dimensions can be, but they still remain viable to a certain extent.
There are a bunch of very different ideas floating around which get mixed up. The typical one is this one, that there is the idea that extra dimensions exist in which only gravity can extend, and it therefore gets diluted. The same guy also had the wacky idea that one could have an uncountable numbers of identical parallel kinds of matter occupy the same space without interacting except through gravity, and this would also explain why gravity is weak. I don't know where that went, but the first possibility is taken more seriously. Then there's the unrelated idea that the String Theory has so many different ways the laws of nature could be, that we can end up in one where they are as we observe them for anthropic reasons.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition
