My theory Is That if There are thousands of Galaxy's + We are only a little Spec in The Milky Way There is more of a chance of Extra Terrestrial Life. Whether It's In are Galaxy or another. And I believe that they have visited Earth and are Solar System  Before... Another thing is i know the Goverment knows they exist, but they are hiding it...with evidence in Area 51 i think there is hidden Alien Space Craft Or Evidence. I Recommend The Shows " Ancient Aliens " and "UFO Hunters". And I think at one point in time there has been Life on Mars Whether thay were Humans Or  Aliens... Who Agrees?

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There is little probability that we could get in touch with extra terestrial inteligence, if it exists( and I belive that there is big probability that there is or there was inteligence in the space beyond our planet, and stupidity also).

The probability is low not only because of very big space distance but also becausre of possible big time distance. 13 billion years is too much time for civilisations which probably rise and fall in ash of time.

You do realize that just because the History Channel is boring, that doesn't mean its true, right?

What about UFOs, ninoak? Could they be extraterrestrial vehicles?

 yup...

 The truth is out there....we are not alone....and never have been...

To shane97:

One part of UFO's could be visual atmospheric effect or clime changing effect. Others might my high tecnology yet not shown to the pubblic. For examle, why UFO's seem to be somehow changing in design as design is changing in our world?

Last possibility are visitors from other paralel dimensions, seems more probable that visitors from other galaxies/ or stars from our Milkway.

I actually like the theory of our origins described by Stanislaw Lem.

Anybody here read his stuff?

I've read some of his short stories.

I think one was called Odd Digit(???), it was very amusing.

I don't recall it, probably because I haven't read a whole lot either.

          The History Channel

If it's this boring, then it just has to be true.

 Kewl! I'll mail some of the stuff between my toes to NASA first thing tomorrow! :)

The chances of us being alone in the universe are so close to zero, they might as well be zero. That certainly doesn't mean extraterrestial life has been to out solar system though...

Probability suggests we are not alone. I, however, remain skeptical of most of the hardcore UFO theorists. UFO sightings by airline pilots and astronauts ( without a cause to promote) suggest there is something out there.

Are we really that interesting that little gray men should spend so much effort visiting us? 

I think it's highly probable that there is life on other planets somewhere, even possibly sentient life.  But I'm totally skeptical that any of it has visited our planet.  People just don't seem to understand the incredibly vast distances involved in our universe.  The nearest star to our own sun, Alpha Centauri, is 4 light years away.  That is, if you were traveling at the speed of light, it would take you 4 years to get there.  Alien life is subject to the same laws of physics as we are, so if aliens on a planet revolving Alpha Centauri were somehow able to develop travel at the speed of light, then they'd still have to pack enough oxygen, food, water, or whatever for four years of travel (and then enough for another four years back).  Unless they're freezing themselves (like in the movies 2001 and Alien) it would be hard to travel such long distances.

Another problem is that the UFO crowd always has the idea of all alien cultures being far more technologically advanced than we are.  Who's to say that life on other planets is sentient for one, and secondly, has evolved past the point of being cavemen using primitive tools?

And the last problem with the UFO crowd is that as soon as someone sees a strange object in the sky, it's automatically assumed by them that 1.  It's a spacecraft, and 2. It's extraterrestrial in origin.  Just because we see something flying in the sky is not a reason to jump to these conclusions.  There are plenty of strange terrestrial military aircraft which were assumed to be UFO's when they were still in the classified testing stage.  Sightings of strange craft around Area 51 and different military bases which house units flying UAV's (unmanned aerial vehicles) are common.  So just because something strange is spotted doesn't mean it's a spacecraft, that it's manned, or that it came from outside our planet.

Not to say that aliens aren't visiting us, but the actual evidence seems less than convincing to this skeptic.

The more observant amongst you migh notice that my "STATUS" is a line from this song:

Probability. If there are 10^20 (a number plucked from thin air but it illistrates the point) planets with life, the chances of us being the most advanced are miniscule.

Apart from that, I agree with your post though!

 Well If they were more advanced than us then they might have the technology to use demention traveling...Only time and technology we will find out...