there is no scientific evidence or widely accepted theory that suggests time travel into the past is possible. The concept of traveling back in time raises numerous paradoxes and logical inconsistencies, such as the grandfather paradox, which makes it challenging to envision a consistent framework for such travel.
While there are speculative theories, like wormholes and certain interpretations of quantum mechanics, that propose the possibility of time travel, they remain largely theoretical and lack empirical validation. Time travel into the future, however, is theoretically possible and has been observed in experiments involving high speeds and gravitational fields, known as time dilation.
and significant discoveries or breakthroughs may have occurred since then. It's always a good idea to stay updated with the latest scientific research to gain accurate information about the current understanding of time and the potential for time travel.
As for changing events in the past, the concept of altering the past creates logical paradoxes. If one were to change an event in the past, it could lead to contradictions and inconsistencies. For example, the grandfather paradox mentioned earlier: If you were to go back in time and prevent your own birth by killing your grandfather, it would create a contradiction because then you wouldn't exist to travel back in time in the first place.
However, it's worth noting that in works of fiction, time travel is often explored and portrayed in various ways, allowing for changes to the past and exploring the consequences. But in the realm of current scientific understanding, the idea of altering the past is highly speculative and not supported by empirical evidence.