Daily Archives: Mon, May 7, 2018

If time travel is possible, how would we know? Wouldn’t there will be time laws to stop time interference?

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One of Hawking’s arguments in the conjecture is that we are not awash in thousands of time travelers from the future, and therefore time travel is impossible. This argument I find very dubious, and it reminds me very much of the argument that there cannot be intelligences elsewhere in space, because otherwise the Earth would be awash in aliens. I can think half a dozen ways in which we could not be awash in time travelers, and still time travel is possible.”

– Carl Sagan, American astronomer, astrophysicist, and author.