According to our current understanding of physics, it is not possible to travel faster than the speed of light. The theory of relativity, developed by Albert Einstein, states that as an object approaches the speed of light, its mass would increase and its length would contract, making it increasingly difficult to accelerate further. At the speed of light, an object with mass would require an infinite amount of energy to accelerate, which is not feasible.
Additionally, the concept of going back in time by exceeding the speed of light is purely speculative and not supported by scientific evidence. Time dilation, a phenomenon predicted by the theory of relativity, does occur at high speeds, where time appears to slow down for a moving object relative to a stationary observer. However, this does not enable traveling back in time.
It's important to note that time travel into the past is still purely theoretical and has not been proven to be possible within the framework of known physics. While there are some interesting concepts and thought experiments in this area, they remain in the realm of speculation and are subject to ongoing scientific research and exploration.