[ChrisCantSkate]

i think if we figure out time travel, we would be smart enough not to go back and alter events that ultimatly led upto the civiliation that made this technology work.

according to your diagram once time travel happens the previous universe stays there still functioning. however if you change anything, then the course of events that led to the current(future time before you travel back) civilization wouldnt happen, and changing major events such as an outcome of a war could mean certain technologies would not be discovered then the second you travel back in time your time machine no longer exsists, and you yourself would not even be there since the course of events that led to you going on this journey didnt take place.

if you stop a terror attack or something of that nature that seems like it only helps, you risk having them attack on a larger scale. maybe the 9/11 attacks are stopped and the handful of taliban are stoped by an unknown person from the future. osama isnt hunted by america and he can plan another attack, possibly more devistating. ok so now they attack again with a nuke and hit washington(just go with it), and end up tearing america apart into smaller nation states. yes this is worst case senerio, but when you think about altering the past you need to look at anything that could ultimatly negate the future technology and then making the time travel back never happen....

also what about your past self? would you be able to meet your past self(episode of southpark comes to mind) and tell them anything, and every word you speak does your current state change because of some life changing advise you give to yourself as a child? what if you touch yourself? (lol that came out wrong) can 2 different beings of the same matter be in the same spot at the same time or would it be destroyed, or super powered?

i dont know too much about time travel, however is going back in time the only theory we have or is future travel possible, and does this follow the same theory on lightspeed travel?

lol you got my brain thinking about stuff im never going to have answers for... damn you