I agree with time-travel seeming implausible, although not necessarily for 2nd Law reasons. 

However, something about the true explanation will require changing our understanding of something. Also, there’s growing evidence that our cosmological model isn’t exactly correct. 

Undisciplined

This is the cool thing about called “conspiracy theories”, where no conspiracy at all. We try to glue together many pieces of missing informations, some see a piece while others see the other piece and try to understand what the whole thing is.

So far, what I know about this is that it would violate the second law of thermodynamics, which would hardly be violated.

aliens_and_UFOs

Why Congress Is Seriously Investigating UFOs

This is the cool thing about called “conspiracy theories”, where no conspiracy at all. We try to glue together many pieces of missing informations, some see a piece while others see the other piece and try to understand what the whole thing is.

>but time-travelling humans.

So far, what I know about this is that it would violate the second law of thermodynamics, which would hardly be violated.