Time travel possible

How can time travel possible

Its impossible, or so it seems

#1 We wouldn't have been here, if we knew the answer.

The first thing we'll do when we discover time travel, is to go back in time to tell our past selves about it.

But it didn't happen.

Time travel is possible by creating a time machine #1 ;)

@The_Troubled_Patzer we just say that time Machine will take us back but if you don't know how time Machine can be made and work then we don't have any idea

Time travel is possible in my opinion.(Only to the future, cause I do not assume that some wormholes exist, and if they do that we would find a way how to travel trough them.)

Time is affected by two things and it's phenomenon is called time dilation
Gravity
Velocity
Astronauts who travel in high velocities relative to an average human being on earth will age a little slower
For eg (just a hypothetical case, i dont know the exact number)
Astronaut who has spend one year in space will be 0.000(whatever milliseconds) younger than his twin back at home
Feel free to correct me, after all I am not pursuing physics just have a particular interest in it

@thibault i fear the first thing that will happen, one will travel back and eliminate all the others to get total control.

@thibault the butterfly effect is real..any intrusion into the past will have an effect on everything after it...but it is a question that keeps a certain kind of people endlessly amused.. :)
Me most of all...