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Anthropic arguments such as this are good for examining reasons why spacetime with a different number of dimensions might not support interesting universes, but
by aardvark179 11y ago
Anthropic arguments such as this are good for examining reasons why spacetime with a different number of dimensions might not support interesting universes, but they fail to ask answer the question why we have a spacetime with 3 dimensions.
Some non-string theory attempts at formulating quantum gravity have started without an assumption of space-time and attempted to make it an emergent property, and given 3-dimensional space's quite unique properties that feels like it might ultimately be a better course of reasoning.
- spacehome 11y agoCouple that with Max Tegmark's ideas about multiverses. The idea is that all possible combinations of dimensions exist as a universe. We see 3+1 dimensions because this is the one combination that's most likely to develop life. http://arxiv.org/abs/0704.0646 http://arxiv.org/abs/0704.0646
- rayuela 11y agoYou got any recommended readings on these non-string theory emergent space-time theories?