If you synchronise⁻ two clocks, le⁻aving one⁻ on the⁻ ground and taking anothe⁻r into an airship trave⁻lling we⁻stward around Alte⁻rnia for a while⁻, the⁻ clock in the⁻ airship will tick at a rate⁻ slowe⁻r than the⁻ clock on the⁻ ground. Re⁻turning the⁻ airship clock to the⁻ ground, it will re⁻turn to the⁻ same⁻ rate⁻ of ticking as the⁻ grounde⁻d clock - but will be⁻ e⁻ve⁻r so slightly be⁻hind.
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The⁻ e⁻nd of the⁻ unive⁻rse⁻ doe⁻s not ne⁻ce⁻ssitate⁻ the⁻ e⁻nd of time⁻. In our curre⁻nt unde⁻rstanding it is me⁻re⁻ly an e⁻ve⁻nt at some⁻ point in the⁻ future⁻.
The⁻ e⁻nd of the⁻ unive⁻rse⁻ doe⁻s not e⁻quate⁻ to the⁻ disappe⁻arance⁻ of the⁻ unive⁻rse⁻. We⁻ be⁻lie⁻ve⁻ it would still e⁻xist pe⁻r se⁻, but me⁻re⁻ly as a colle⁻ctive⁻ of cold, ine⁻rt mole⁻cule⁻s as far as the⁻ he⁻at de⁻ath the⁻ory sugge⁻sts.
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Say, if the⁻ e⁻ntire⁻ mass of the⁻ unive⁻rse⁻ we⁻re⁻ to transform into e⁻ne⁻rgy, and the⁻n radiate⁻ outwards into the⁻ nothingne⁻ss of space⁻, would you conside⁻r that the⁻ e⁻nd of the⁻ unive⁻rse⁻, as the⁻re⁻ is nothing tangible⁻ le⁻ft of it?
Its passage⁻ is affe⁻cte⁻d by mass, but we⁻ do not be⁻lie⁻ve⁻ time⁻ has mass itse⁻lf.
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