If we think of the universe as a continuous chain of cause and effect and time as the sequence we experience moving forward along that chain, then there is no need for concern.
Under this interpretation, the past, present, and future are all determined by unchangeable physical laws.
Even events that appear random, such as radioactive decay, are predestined and impossible to predict, but should unfold in the same way every time.
Traveling back in time to meet your younger self implies that the event has already occurred in the past.
If you don’t recall, it’s possible you were incognito or had your memory erased afterward, but we have already established how this impacted your future.
Conversely, if you were to journey to the future and encounter your future self, you would need to return to your original time and continue living your life, or else there would be no one to meet in the future.
This means that the future version of you that you meet when traveling forward in time will already have memories of your encounter as a time traveler.
Or, if each cause-and-effect interaction generates parallel universes in an infinite branching series of potential timelines, then every version of reality already exists somewhere, and your actions may not matter in the grand scheme of things.
Fortunately, time travel remains purely theoretical, and all proposed methods require exotic matter or negative energy to operate on a large scale.
This is essentially explaining one impossible concept with another. The only form of time travel we are aware of involves progressing forward at a rate of one second per second.
This article is in response to a question from Andrew Robbins emailed to us: “If time travel were possible, could we actually avoid encountering our past selves?”
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Source: www.sciencefocus.com
