According to our current understanding of physics, time travel to the past, particularly in the sense of physically traveling back in time, remains purely speculative and not supported by scientific evidence. The concept of backward time travel introduces numerous paradoxes and challenges, as I mentioned earlier.
Proving the possibility of backward time travel using science would require empirical evidence and experimental validation. However, no such evidence or scientific consensus exists. Time travel to the past violates many fundamental principles and laws of physics, such as causality and the second law of thermodynamics. Theoretical frameworks that explore the possibility of time travel, such as some solutions within general relativity, involve exotic and highly speculative ideas such as wormholes and negative energy densities, which are yet to be observed or confirmed.
It's worth noting that scientific understanding evolves over time, and our current limitations may be overcome in the future. As scientific knowledge progresses, new discoveries and theories may shed light on the nature of time and potentially reveal possibilities that were previously unknown. However, at present, time travel to the past remains in the realm of science fiction rather than established scientific fact.