There is nothing 'simply' in time travel. It's meant to be impossible, but then-- my own Warden is all tangled up in the stuff, so what can I say to that. But I'd have to maintain that any time travel would be accidental. There's a few nutters rattling about that think FTL jumps could trigger a time paradox, but no one takes them seriously, but supposing it could happen--

It'd explain religions and cultures. But that's all.

S'pose it's a start.