Time machines: A scientific reality?

If we could go back in time, then the universe could have infinite mass, because we could always send people back from the future until there were so many we could shoot them into orbit and have them coalesce into new planets.
So, time machines are the solution to our finite energy problems.
but how can you go back in time? How would you control where in the universe you would appear when you went back in time?

>>6
Thanks for making your first sentence

According to relativity, moving something faster than the speed of light is akin to it moving backwards through time
thereby saving me the effort of having to read the rest of your post to figure out how full of shit you are.