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It says in the article that the four fundamental forces were unfied during the GU epoch. I thought gravity had separated at the end of the Planck era, and the remaining 3 were still unified until the storng force split off at the end of the GU. I'll look into this further and will change article if need be. 24.21.139.41 13:26, 14 May 2007 (UTC) reply

If gravity had separated, how can one say that mass was meaningless during this period? — Preceding unsigned comment added by 70.145.142.201 ( talk) 09:51, 14 August 2008 (UTC) reply

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Exactly the same question occurred to me. Can someone please answer? Winston ( talk) 17:02, 20 October 2023 (UTC) reply

This article does not emphasize enough that grand unification and the grand unification epoch are relatively speculative hypotheses Aknochel ( talk) 10:23, 13 May 2014 (UTC) reply