Is Time Travel possible? This theory opens new window of reality

tech.hindustantimes.com:

Is time travel possible? We all have wondered this at least once in our life. And it also remains one of the biggest mysteries for physicists to solve. From popular media to scientific journals, many have tried their hands at understanding and explaining this problem in their own ways. Even Albert Einstein, the great physician, took up the challenge of understanding how time works and wrote his general theory of relativity around it. In short, time travel is the most fascinating yet confusing puzzle that exists. But if you look at the theory of relativity, it does offer a small window into whether time travel is really possible or not. Read on to find out. Also read: Space triumph! Photos of 4 brown dwarfs taken by group of researchers

In short, there are two big challenges in proving whether it is possible or not. The first is technology. Even if a physicist does prove time travel to be real based on a genius equation, we would never really know unless we can build a machine capable of traveling through time based on that equation. But to build the time machine in the first place, we would probably need rare cosmic material and technology that we do not have access to, at present. This is how technology has always grown. Theory comes first, and then once technology catches up, the theories turn into reality. Virtual reality is a good example of it.

The next and probably more significant challenge for time travel is consistency. Consider this. You find a machine that can be used to travel back in time. You used it and went ten minutes back in time. After reaching the past, you killed yourself. But now that you have killed yourself, you could not have found the time machine ten minutes later and traveled to the past to kill