And why does Earth have to be the only habitable planet?
What if Jupiter is the Earth in Galaxy X-375?
In other words, Water, Air, and Food don't have to make a planet hospitable.
Maybe alien animal life forms developed their bodies in such a way that they survive on Carbon Dioxide and fly through the air in a Gas Giant.

It's all just speculation...
Maybe when we get Space Shuttles we'll really know.

maybe some aliens are like plants, but they can move around.... they get their energy from a star and use a photosynthesis like reaction to create everything they need.

There are a million and one possibilities for how life on other planets could have developed.

Intelligent life however is a lot less likely than life in general.

I believe that aliens are real. Honestly, with such a vast universe to assume that we have the only planet with life on it is just stupid. That, and I saw a UFO once years back.

I sort of disagree, geo. I think that if there's one out there, then the other is probably out there as well. But I agree in the sense that if we found other life on a planet, it's more likely to be "unintelligent." The structural complexity of intelligent life is much higher

I'm trying to re-read my post to figure out what you disagree with... maybe explain what you disagree with so I can understand. My post wasn't exactly serious. I was just speculating with everyone else about how life might have formed and how there are any number of forms that life could possibly take.

And yeah, intelligent life is probably fairly rare in the universe. Not so rare that it's not possible to have but pretty unlikely. Even more unlikely that eve if there is intelligent life they would not even know we exist yet. The earliest broadcasts in either TV or radio are from the late 19th or early 20th centuries.... travelling the speed of light those waves (if they are even still strong enough to be traveling) would only be about 100 light years away at the most. Life would have had to exist fairly close to this planet for anyone to know we're even here.

"Intelligent life however is a lot less likely than life in general"

I both agreed and disagreed with that statement

To deny the fact that their may be other intelligent life out there is very selfish. Do aliens exist in the way we see in the movies or on television? Maybe, or maybe not. People who are generally stable and claim to have had some sort of experience with another life form should not necessarily be discredited. There have been plenty of prominient people who claimed to have had experiences with an extraterrestrial life.

There have been too many sightings and personal experiences to discredit all of them. If you look back thousands of years in cave drawings and other writings, people have possible seen things worthy of them drawing on walls and stones.

Much like other supernatural topics one wont believe until they experience something themselves. I consider myself a very rational and stable person and have had experiences that I can't explain. Other life has to exist in the endless place we call space.

There's an entire universe out there that hasn't been explored, so I would say yes that somewhere out there there are aliens.

I think there is life outside our planet, which would mean there are aliens, although they would notin the way they are shown as in movies.

I believe that since the universe is big, that there are some lifeforms besides us.

Before the subdivision of Kingdoms are put in (Animals, Plants, Fungi etc) Life is divided into different Domains. Each domain sort of houses life in a respectable environment. Our domain is most commonly known as Earth, but this kind of environment potentially includes other planets from 'habitable zones' or Goldilocks planets from other solar systems (a good example is Gliese 581c). The only thing you need for the building blocks of life (this doesn't count what the backbone is made of - in our case carbon) is liquid water, or another substitute like liquid methane (but we can't live in such a cold environment for those kinds of substitutes to exist).

Overall I believe other life does exist, but in the kind of environments and planets that we ourselves would consider hazardous and unstable. Its just like you never see Eskimos down near the equator during summer, etc. They most likely won't live comfortably on our planet as we would on theirs either.

Aliens are real for the main reason. If aliens were not real tahn we would be the only intelligent life out there in the Milkyway or the entire multiverse. So, think do you think we can be the only intelligent like out their that could produce technology or logical thought.

i have personally seen what i believe to be a UFO. 2 of them actually. i was sitting on my back porch smoking a joint (and no, weed does not make you hallucinate), when i noticed what i thought was a satellite. i knew it wasnt a plane because it had only 1 bright ass light, and it wasnt blinking. then i realized that it was flying waaay too low to be a satellite, yet to high to be a chopper.

then, i saw another light, at the exact same altitude as the first one, on the exact same path, going the exact same speed. suddenly, the first dot made a 90° angle turn, and the second made a 45° turn to attempt to cut it off. unfortunately, i never did get to see what they were up to, nor if the first dot caught up, as both lights suddenly went up and out of the atmosphere, at which point i was no longer able to see their lights.

Originally posted by JigSaw

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They don't exist in your realm for a good reason, our realm is minipulated by cultures bound on corporate media agendas where they laugh and make jokes of surreal phenomenons. While people can deny the existence there is one thing you can't deny and that is the shadow government controls the outcome of their perceived vision that is why it's easy to deny their existence just like Gods existence.

If you think the Battle of LA was a weather balloon or a group of UFO's flying over washington DC in 1952 in this clip are a joke... think again http://www.youtube.com/watch?v=sTZ7O9cfpPQ

Phil Schneider and William Cooper are two names you should look up both murdered for their knowledge of E.T.s and shadow government.

Many many more people know they exist for fact, government knows for fact, citizens however, are clueless of their surroundings.

Infact, how do you think we came up with laser technology and all this crazy advanced technology out of nowhere? Government is over 30+ years ahead in technology then consumer products... why? Because they are learning it all from reverse engineering from UFO crafts, mixing genetics from one creature to another, in fact you can guarantee our economy is destroyed with some help of tax payers money for funding black projects.

Aliens are real... look back at history at the Egyptians, Myans, and all them, all of them have alien agenda's all over their sculptures. There are several egyptian sculptures and paintings which show aircraft when aircraft did not exist to mankind as well as depict reptilian/alien like creatures.

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I'm sorry. I shouldn't laugh at a post like that, but every word of it looks like a conspiracy theory, especially with the invention of the laser. Not that I'm necessarily disagreeing with you, but I think that if an alien cruiser capable of faster-than-light speed that can cut through ice effortlessly, has the agility to hide behind a cloud seconds after being seen, and oh by the way is made out of either fire or light depending on who you ask, the government isn't going to know where to start reverse-engineering the darn thing.

Now, as this is a subject I've done a lot of thinking on I'm going to just tell you my opinion now before I read the rest of the topic so you can get my honest opinion.

Now, let's look at the sheer freaking size of the universe. It is pretty frigging big. As far as we know it's at least some big number like I think 46 billion light years in radius. And that's only as far as we can see. The distance between the Earth and its sun is already mind-bendingly awesome; the distance between Sol and Alpha Centauri is enormous; the radius/diameter of our galaxy (BTW, the Milky Way is one of the larger ones. Just FYI); and the distance between galaxies. That's pretty farking leviathan. I think that in a universe the sheer size of ours we'd be pretty full of ourselves to assume we're the only sentient life form. The term "only fish in the sea" leaps, quite understatingly, to mind.

But let's look at the size of it again. Are we expecting extraterrestrials to traverse that distance within a reasonable period? And keep in mind 46 billion light years is only the OBSERVABLE distance. We have no idea what's beyond that tiny sphere we can see. Granted, they may have mastered worm holes, but you should also keep in mind that space entities like black holes and worm holes are all largely theoretical in nature in spite of some evidence toward each of them, and no matter how much scientists try to use their little method to try and understand the skull-cracking intellect we would need to understand such technology, I'll be pretty convinced when I see it.

That said, do I actually believe in aliens? I'm kind of a fence case. I think they exist, and that the government(s) is/are definitely hiding something (is EVERY flying saucer that crashes into something swamp gas? The Feds seem to think so), but whether that "something" is a secret conspiracy designed so that the U.S. can work alongside the aliens ('cuz the U.S. is SO important, as opposed to those idiot Russians and Chinese) or whether they're just covering up signs of life remains a mystery to me. In basic terms, even if we're in some form of communication, I don't really expect them to have arrived. And even if they did, they've been abducting people for something like 50-100 years now; why do they still want semen samples from us?

Now, granted, the Apollo 11 mission itself had encounters with UFOs and possibly alien astronauts, and NASA films UFOs on a regular basis. Look at the Wow! signal. It's hard to say that everyone on those research teams were having the same hallucination (another Government excuse used waaaay too much). And those are pretty much why I've been convinced aliens exist and they miiiight be interested in us, but not as much as people seem to think. Scanning a nuclear device is one thing, but they can't possibly need 10% of the world's population to get a pretty good idea of where a human pees out of.

Oh, and as far as warring with them goes? The whole Dulce Base thing? They have ships that can travel in space, air, sea, and probably land. They can travel from one star to another without aging to death, and they make a really good cheeseburger. We would be extinct by now.

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Now I read on Answers in Genesis once regarding the presence of extraterrestrials from a Christian perspective, and I feel it's worth mentioning because their point of view is total BS. Basically, when humanity sinned, it tainted all of creation, but Jesus only died for the earthlings, so it would be cruel to allow the aliens to go on living with no chance of salvation: thus, no extraterrestrials. I call foul: if man's sin tainted life forms that live billions of light years away, I'm pretty sure God's forgiveness would stretch that far. And the Pope doesn't have to tell me it's OK to believe in aliens, because it's not a religious matter.

I think that there are aliens in planets other than our own, but if they are on our planet and we saw one, we probably would not tell anyone, because everyone will think we are crazy.

I and many astronomars think there is an incredibly high possibility that they do exsits. Because if 1 star makes can make a solar system a ther are over 100,000,000,000,000 (100 trillon) stars in a galaxy just think about how many planets there could be look at all these Galaxys they go on to infinity.

Yeah...there is a really high possibility that there are other life forms on different planets...but the possibity that we will ever communicate with one is very, very low...

Ok this may sound crazy but i think there are entities that have been here for years that have not unveiled their true identity. Please hear me out

We have alot of technology that is on this earth that was 'created by scientists' ... but in all actuality there are no plans/drawings of any of this.... also i believe some of our early inventors have been influenced by foreign beings. When the 'aliens' do decide to come forth and tell us who they are, i dont think it should be a big surprise..... I mean if they come forth and expain it all, and explain how they have been here for years and have not destroyed our planet, yet they have actually furthered our advancements.... will people really be that uptight? Will they want to extradite them from the planet? How will people react?

http://www.youtube.com/watch?v=66Th0ENBmeA

Humanity look! What if UFO's as we call them, are guardian angels. What if they protect our planet as it goes through the vast universe. Think about this since most people agree that they exist. Think how long do they live? What if they can't (as humans call it) die?? They are eternal beings. Here's a question why and how did dinosaurs become extinct? Were humans being being killed by the huge lixards on a large level and then a "order" was issued to destroy them.

Also those who think they helped us create negative technology. The computer, the ability to talk all over the world. These tools if taught by them needed to come about to help people spread information. Satan the "fallen angel" what if he is one of them?? So couldn't he spread the negative weapon uses around the world to help society destroy itself? He wants us dead as do the NWO.

T.V., cameras, radio, computer, internet, phones. Think what the world would be like without it. How could I communicate with people all over the world. How could we inform one another about the, "what's happening" around the world. Back to point technology is only as evil as the person who uses it applies it to.

Finally I forgot to mention this. The people who are abducted... What if the "UFO" are storing our genetic code just in case the world has to be wiped clean of evil. Or if the sun cannot survive and we must be moved to another planet.. Think outside the box people and think why do these UFO (A.K.A Guardian Angels) allow us to stay alive if they could kill us so easily? Meteors that come toward earth I believe they stop them.

I believe in aliens only because it's hard to believe that we live alone in this vast universe. Now they may not look like we think they do they could look just like us for all we know!!!