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Originally Posted by Cougar
I am a little puzzled, however, at the above quote, where you agree with JimJ that "we live in curved spacetime." Locally, of course, this is true due to the gravitation of the Sun and galaxy. But cosmologically, observations point to a flat spacetime, or very nearly so. So JimJ's attempt to apply local conditions to the universe as a whole rather goes nowhere, as far as I can tell.
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I believe you are right, that on a cosmological scale, our universe resembles a flat spacetime. My comment was intended only to point out to JimJast that even in curved spacetime, such as found in our local vicinity, mainstream science holds energy to be conserved. I did not to mean to imply that spacetime is curved on the cosmological scale. I am not a cosmologist, nor have I played one on TV
Please feel free to point out any other errors I have made!