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Message: <blockquote data-quote="Jhaelen" data-source="post: 6641083" data-attributes="member: 46713">Actually, the way I understood it, the existence of dark matter was posited to avoid having to introduce new math. I.e. if there was no dark matter, we'd have to revise our math to match our observations.Likewise dark energy: if our math is correct, then dark energy must exist, otherwise our observations make no sense. Again the alternative, if I understood it correctly, is that our current math is simply incorrect (when applied to the universe at large).I agree that wormholes are an entirely different beast: they're not required to explain any observations we've made. They're just something that might exist, according to our math. I had assumed that tachyons were in the same category...</blockquote>