True nothing? One final all-encompassing element or molecule? Same as before the big bang?
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We don’t know for sure if the universe even will “end” in the sense of heat death, but signs are pointing that way. The current speculation is that all particles will decay into energy and radiate away until the presence of anything in any region of space is negligible. But also, none of us can truly fathom how absurdly long it will take to even get close to such a state.
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