There's another more expanded theory for the big bang that explains how time works that we don't have yet. It's called the PAK theory. The two types of time travel I have heard of work off of PAK theory. There is a third type also, but we just can't do it, though other intelligences may be able to. None of these use a black hole.
My Theories/Ideas on time travel. *Thread is pretty long if your willing to read alot*
- Thread starter Rokuentari90
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Thanks 
, related to the discipline, there is an urban legend that CERN discovered particle synthesis, through the studies of sub-atomic matter, Quarkonium and when the NSA found out they alerted the GSA who threaten to cut the research funding unless CERN sign a mutual disclosure stating that they will never disclose the discovery!!!, Now something liked that has my mind doing Lorentz loops, LOL
, related to the discipline, there is an urban legend that CERN discovered particle synthesis, through the studies of sub-atomic matter, Quarkonium and when the NSA found out they alerted the GSA who threaten to cut the research funding unless CERN sign a mutual disclosure stating that they will never disclose the discovery!!!, Now something liked that has my mind doing Lorentz loops, LOL