Time travel is possible or impossible?
According to me, Time travel is impossible, because time itself is a theoretic concept. Movement of earth is divided in equal intervals and is called time by humans and everything is made relative to it to understand everything. As a result, people started thinking that time too exists as something substantial.
What is time? When earth is moving in a particular forward direction in the galaxy as well as along the galaxy, it is actually time travel for human beings without realizing it. Every micro-second is just an inverval of distance travelled.
One may think that they travel faster if they can make a machine that can travel faster than light, but then as well only that machine will reach a point faster than earth at a place in space where they cannot see the future or past of events happenings on earth in TIME’s past or future because the things n people on earth will be moving in space at only earth’s pace and thus according to earth’s respective current time at every moment of its movement.
I guess someone with a lack of proper understanding may try to contradict this with some old-school theory but the reality n practicality of concepts matter more than those theories based more on unproved assumptions than on facts.