AstroGamer on 24 October 2013
You can speed up or slow down time as much as you like if you obtain the right speed but you cannot Time travel backwards in a single universe. The only way its possible is with traveling between dimensions but it is unlikely you could return to the "Alpha" world though. Maybe if you did something like the plot of Steins;Gate but returning to that world means that you wouldn't likely have the memories so there isn't a point
