3 ms·

(2017)

• verbify 2y ago
  [22 million years ago]
  • Scarblac 2y ago
    That was in 2017, it's 22000008 years ago now.
    • subscribed 2y ago
      Time doesn't pass uniformly :)
  • wizzwizz4 2y ago
    That's subjective. Objectively, all we can say is that it happened before 2017.
    • gerad 2y ago
      No it’s relative. ;)
      • pavel_lishin 2y ago
        Well, it certainly didn't happen tomorrow.
        • exe34 2y ago
          in some reference frames, yes.
          • deleted 2y ago
            [deleted]
          • wizzwizz4 2y ago
            No, not if we've observed it. There are predicted historical events which can be shunted into the future by running away bravely, but if you've seen them happen, you can only change how long ago.
            • exe34 2y ago
              not for us, but in some other reference frame.
              • wizzwizz4 2y ago
                If by "reference frame" you mean "observer who lives in the past", then yes: the past is sometimes the future of a more distant past.
                • exe34 2y ago
                  no, relativity allows for reference frames where the event hasn't happened yet, even though it has happened for you. there's no simultaneous "it has already happened" for all frames.
                  • wizzwizz4 2y ago
                    There is if the event is in the past or future light cone. If A sends a signal to B, and B receives it, there is no reference frame where that signal went backwards in time. (Unless you count exotic ones, like "particle with imaginary rest mass is zooming along at thrice the speed of light", but you can't accelerate to such a reference frame so I don't.)