Yes, yes, I know that time travel is theoretically unsound (you may even say "impossible"). There's no good positive indications that it is
happening, or ever will happen. I understand that.
But when it comes to a alien and UFO reports, a time traveler scenario seems (to me, anyway) much more likely than visits by beings from other
planets. Here are a few reasons why:
* We know people exist. That's something we can't say for aliens. Sure, we can assume that there are other intelligent lifeforms out there, but
if we're going keep our assumptions to a minimum, it makes a lot more sense to make aliens a secondary choice for an "explanation." We have no
radio signals, no bugs, no nothing to suggest there's anybody else out here in the Universe but us. So let's work from there.
* People are good at figuring things out. While time travel might currently be a theoretical impossibility, we have a knack for finding new theories
that do allow things to happen. It used to be thought that atoms couldn't be split, too. Give us a few thousand years to play with it, and time
travel might not be as hard as is seems.
* Continued lack of convincing physical evidence. UFOs and aliens sure are good at covering their tracks, aside from a few questionable ground
traces. And the ground traces the have been found usually don't have much "alien" about them. Well, of course they wouldn't, if they came from
Earth in the first place.
* General elusiveness. These aliens and UFOs are sure slippery rascals. The always seem to stay just out of reach, and never quite leave any
evidence that could pin them down. Sort of like Gilligan always screwing things up just enough so the castaways don't get off the island. It's
ridiculous. As skeptics say, how come, with all the sightings, isn't there even one piece of completely convincing evidence found?
It's a good question. The odds are just too high that so much strange stuff could happen and not one decent piece of evidence is left behind,
unless... Unless they had a way of knowing exactly what mistakes were made and what damaging evidence was left behind. But how? Well, if you're
from the future, all you have to do is look at your history books to find out just where and when the evidence was left behind, then go back and make
sure it wasn't left in the first place, and solve the problem before it happens.
* Humanoid appearance. A lot of aliens are reported as being humanoid. Well, of course they would be if they're our descendants. The chances of
an alien species looking like us is even higher than for their actual existence.
* General non-interference. Aliens certainly keep a low profile. They don't land on the White House lawn, and generally do as much as they can to
stay out of the history books. The chance of ruining their own future existence might be a good reason why. If you don't buy into the very
theoretical notion of "alternate time lines," you can see where significant intervention in our time could be very risky. A few nutty stories or
blurry photos is fine. No harm done. But nothing that would cause a huge disruption.
* Technology seeding. As Jacques Vallee noticed in his research, aliens seem to be slowly teaching us to move forward technologically by giving us
little glimpses of technology that is only a few decades more advanced than what we currently have. Considering that aliens could be thousands or
millions of years more advanced than us, it's too much of a coincidence that they are so close to us, technologically. Unless they already know how
much we know at any time. If they we're very subtly moving us forward by showing us glimpses of our near future. Why? I don't know. For some
reason, it's important for us to advance and evolve faster than Nature would ordinarily let us.
* Punctuated societal development. Ever notice how human society, from the very first cities and states in the Near East to today, seems to advance
in quick bursts, rather than steadily and slowly. Everybody always says how odd it is that the Sumerians seemed to come up with such complex laws
seemingly out of nowhere. And many great advances follow spikes of individual and communal insight. The more you look at it, the more it appears
that we are being slowly but surely manipulated over the course of thousands of years. Who would be able and motivated to do that? People from our
own future would have the necessary perspective to do it. Again, though, I have no idea why. I don't have that perspective, myself.
Anyway, those are just a few of the things that tend to make me think that time travelers, and not outer-space aliens, are the answer to many of the
questions arising from the fleeting sightings, odd coincidences, strange anomalies around major historical events, and so on. Space and time are the
same thing, though, so these stealthy manipulators might qualify as "alien," but they really aren't. They are different from us, in terms of
perspective, and possibly chosen design.
But who else would be as interested in us, other than ourselves? If nothing else, we have no shortage of ego.