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I think the point of the article is summed up in one of the last paragraphs, "If time travel is possible, he submitted, then time itself is impossible. A past

I think the point of the article is summed up in one of the last paragraphs, "If time travel is possible, he submitted, then time itself is impossible. A past that can be revisited has not really passed. And the fact that the actual universe is expanding, rather than rotating, is irrelevant. Time, like God, is either necessary or nothing; if it disappears in one possible universe, it is undermined in every possible universe, including our own."

ievahanordah 10y ago
The meaning of the words time and pasts are that you can't travel into the past or it would no longer be the past. Or, to call something the past in the first place means it can't be "travelled" to. If there is some phenomena that lets you do something like "time travel". Find a new word for it. Your not talking about time, travel, or past.