Live Science has a short but interesting article about the plausibility of time travel, one of the classic SF concepts.  The article explores the two basic directions of time travel – forward and back.  There isn’t much to argue with in the writer’s conclusions.

As much as many of us might hate to admit it, the past, with all of its mistakes, could remain sealed off from our efforts to redo it.

I think the obvious logical paradox about travel to the past about eliminates it as a possibility (‘if travel to the past is possible, where are all the travellers from the future?’).  And yes, technically we are all travelling into the future all the time.

I do think that we are only likely to experience time travel through some form of suspended animation/cryofreezing technology.  People who undergo that sort of procedure might see the world well beyond their natural lifespans, and from their perspective it will amount to time travel.  But physics based travel into the future at a rate greater than the normal passage of time is not only unlikely, but hardly worth the effort.  We’ll arrive there eventually.