There is one other possibility that these things we see are spiritual in nature.
At which point it is deception that is under certain control by the principals that are in place through religion.
I got this link from another thread, which sort of establishes why that is.
The Bible says God created Adam and Eve -- but what about E.T.?
"The discovery of intelligent life from other planets would be a challenge to the Christian worldview,"
http://www.foxnews.com/scitech/2011/10/05/life-on-other-planets-part-gods-plan/
So far the evidence is indicative for this concept because of what has been reported by abductees, they are either uplifting encounters or nightmarish.
Earth is "specially designed" to be inhabited by living beings, called the anthropic principle.
"The fact that no evidence of extraterrestrial intelligence has ever been detected must be considered ... a confirmation of Christianity," Lisle told FoxNews.com.
Yet it's not too farfetched to believe that there could be life somewhere out there. After all, there are estimated to be more than 100 billion galaxies in the universe, containing trillions of stars and planets.
Lee Strobel, author of the book "The Case for a Creator,” has no problem with the idea of life on other planets. But he points out that the anthropic principle is not a uniquely religious point of view: Pure statistics, he says, suggest life isn't likely elsewhere in the skies.
It goes on to say :
But much of that debate hinges on nuance. There's also the bigger picture stressed by Dr. Timothy Keller of Redeemer Presbyterian Church in New York City: Scientific discoveries do not negate a God who is outside of time and outside of creation itself.
These things we see are also described in colors related to whom they are as depicted by art from the past.
Ufolagy described his encounter as a blue Orb and I have seen three reddish orbs at different times, the reddish orbs seem to cause trouble.
There seems to be a major deception involved when it comes to UFOs, on many levels.
I believe there is life out there but not on our level.
I believe that there is a higher life here and out there that are not on our level but on a spiritual level that is restricted to a point.
The phenomanom of UFOs fits with many things that are in scripture in many ways.
I believe we are seeing all of the possible last explanations of what they are in a multiple or grouped observances.
They all will demonstrate in this reality what we consider UFOs.
That's why we can't put a finger on it, they demonstrate all most the same thing in this reality whether they are time travelers, ETs, spiritual beings.
They all will have to use a similar physics to materialize in this reality.
We will discover it, maybe if we are or when we are able to, or let to have the knowledge to travel with this type of physics.
But from what I have seen of this world we would kill ourselves off with that type of power someone will use it as a deterrent or weapon.
The idiots in power would for instance, travel time to change it, which would be another way of us using it in the wrong way.