^^ well its only a general thing.. if you time travel like i explained then yes you will get to points in time faster and that's about it....  if you could create some kind of bubble around you to protect you from time then maybe you could actually go to the past and change it... like zinga says there are other thoeries that allow for it... but wee also theorize that by using some machane to try and stabilze a worm hole or make a bubble that it will release so much radiation that everything around it will be destroyed....  quantum universe is a way around that basically saying that there are infinte possibities where anything that could happen will happen.. that stuff is just theories as of now so i don't know if its true or not.. no one does.... but it does make sense altho ive never believe in alternate universes and differnt time lines or that theres another me somewhere... i hope theres not another me somewhere anyway lol