As far as our current understanding of physics goes, time travel to the past is purely speculative and not supported by any scientific evidence or known mechanisms. The concept of traveling through time under one's own power, particularly to the past, falls into the realm of science fiction.
In popular science fiction, various methods have been proposed for time travel, but they are purely imaginative and not based on scientific principles. Examples include the use of wormholes, time machines, or advanced technology that can manipulate spacetime.
However, it's important to note that these ideas are purely speculative and have not been demonstrated or proven in any scientific experiments. Time travel to the past is currently considered highly unlikely, if not impossible, based on our current understanding of the laws of physics.
On the other hand, traveling into the future, or "time dilation," is a concept that has some scientific basis. According to Einstein's theory of relativity, time can be dilated or stretched depending on the relative motion or gravitational field strength. For instance, if someone were to travel at extremely high speeds or close to a black hole, time would pass slower for them compared to someone who remains in a stationary position or further away from the gravitational field.
This means that, theoretically, an individual traveling at near-light speeds or experiencing a strong gravitational field could experience time passing more slowly for them. As a result, they could effectively "travel" into the future, experiencing less time than someone who remains stationary. However, this form of time travel is unidirectional and does not allow for the traveler to return to their original time or travel to the past.
It's important to reiterate that these concepts are purely theoretical and have not been practically achieved or tested. Time travel, particularly to the past, remains a subject of scientific inquiry, speculation, and the domain of fiction.