According to our current understanding of physics, traveling faster than the speed of light is not possible. The theory of special relativity, proposed by Albert Einstein, states that the speed of light in a vacuum is the maximum speed that any object or information can travel.
One of the consequences of special relativity is that as an object with mass approaches the speed of light, its energy and momentum increase without bound. As a result, it would require an infinite amount of energy to accelerate an object with mass to the speed of light, let alone exceed it. This means that, according to our current understanding, it is not feasible to travel faster than light.
Regarding the idea of traveling to the past, it is a topic that remains speculative and hypothetical. Within the framework of general relativity, there are solutions that allow for the possibility of "closed timelike curves," which are paths that could, in principle, allow for time travel. However, these solutions often involve exotic and highly hypothetical scenarios, such as the presence of extremely massive objects or the creation of wormholes, which are structures that connect distant regions of spacetime.
It is important to note that the concept of time travel to the past is still largely speculative and lacks experimental evidence or a comprehensive theoretical framework to support its feasibility. It is an active area of scientific inquiry, but at present, we do not have a clear understanding of how one could travel to the past, even if faster-than-light travel were possible.