Explaining time travel without violating the known laws of physics is a challenging task since our current understanding of physics does not support the possibility of practical time travel. However, I can provide you with an explanation based on some hypothetical concepts and theories that have been proposed by physicists.
One concept that has been suggested is the idea of "time dilation." According to Einstein's theory of relativity, time is not absolute and can be influenced by factors such as gravity and velocity. Time dilation refers to the phenomenon where time runs differently for observers who are moving relative to each other or experiencing different gravitational forces.
In this hypothetical scenario, one could potentially achieve a form of time travel by manipulating time dilation. For example, if you were to travel near the speed of light or near a massive object like a black hole, time would appear to pass more slowly for you compared to someone in a different reference frame. As a result, when you return to the original reference frame, you would find that more time has passed for those who remained there, effectively "traveling into the future."
However, it's important to note that this form of time travel would only allow you to move forward in time and not backward. It also requires immense energy and technological capabilities that are far beyond our current understanding and technological advancements.
Another speculative concept related to time travel is the idea of "wormholes." A wormhole is a hypothetical tunnel that connects two separate points in spacetime, potentially allowing for shortcuts or connections between distant locations. If we could discover or create a stable wormhole, it could serve as a means of traveling between different points in time as well.
However, wormholes come with their own set of challenges. Theoretical physics suggests that they would require exotic matter with negative energy densities to remain open and prevent their collapse. Such exotic matter is purely hypothetical and has never been observed, and it is not clear whether it can even exist within the known laws of physics.
It's important to emphasize that these explanations are highly speculative and based on theoretical physics that may change as our understanding evolves. Currently, time travel remains a topic mainly explored in science fiction rather than something supported by empirical evidence or established scientific principles.