Debate... Extra terrestrial life Exist or not!?
90730
Almost certainly, yes. On Earth? No way, no chance. No. No. No. (At least not while the human race is still here.)
586467
No I believe there is other life out there somewhere. The universe is huge so how could we be the only planet to have life?
549958
Yes and it is on Mars! No, this isn't a joke, it's true there's bacteria there. That's life. But if you meant intelligent life, that's another story. I'm guessing there is, but it's very possible that these beings don't know of our existence or possibly know of us but would rather avoid us. Either way, is within the realm of possibility.
283632
There is no evidence to show conclusively that life ever existed on Mars, and the lack of evidence strongly suggests there never was life there.  If even bacteria lived there some trace would show up in the fossil record, and so far the probes have found no evidence of this.\n\nIt doesn't mean that there isn't life somewhere on the planet, or that life existed there once upon a time, but it's highly likely that there never all that much life on the planet.  Life tends to spread -- for example, no matter where we look on the Earth, we find some evidence of life, even if only bacteria, even in the frozen arctic or the middle of the sahara desert.\n\nAt the present time humans cannot live on Mars without an artificial environment.  The air pressure is far too low and the atmosphere has far too little oxygen.  The temperature extremes are far worse than even in the Antarctic.  \n\nWhile it is possible to build a "Marsbase" of some kind the difficulty lies in getting all that material over to Mars from Earth and then down from Mars orbit.  It's one thing to drop a probe through the atmosphere and bounce it hopefully somewhere within a 100-mile radius of its intended landing site; it's quite another to have a steady drop of material that all has to land in the same place.\n\nNaturally the builders could make use of local materials.  The main problem is the lack of water, which only seems to exist on the surface at the poles.  Therefore the base would probably have to be located at or near the polar areas of Mars, so that ice could be harvested and used to produce oxygen.
188003
Alien? What's that?\n\nI think there is a huge statistical probability that LIFE exists somewhere else. And that may be as simple as uncicell forms of life. It may also be another form of life we've never seen on earth.\n\nBut "aliens" as we see in movies, sure not!!!
806535
I believe in Aliens landing. I am not so naive to think that we are the only living things in the universe. I thinks aliens do exist and they are much smarter than we. \n\nThank you for the article. It is pretty cool!!
1037252
If you are referring to other planets that are habitable, I believe that mathematically there has to be intelligent life in other parts of the universe. Here is why.\n\n1. The Hubble Telescope estimates that there are 125 billion galaxies.\n2. Each galaxy has roughly 100 billon stars.\n3. If even 1% of those have planets and only 1% of those are habitable and only 1% of those have life, the odds are high.\n\nThe odds are extremely favorable for there to be extraterrestrial life. \n\nOne can use Drake's equation to calculate the chance of life in our galaxy. Multiply that result times the number of galaxies. See the second link below.\n\nA totally different question would be whether or not we would actually interact with extraterrestrials...\n\nI will leave that one to another Y! Answers Question
439827
duh! there are.....it wud be ridiculousif there werent.the universe is abt 4 to 5 billion years in size.how can there be no other life in other galaxies or planetary systems
350155
Sorry, but there is no evidence of life on Mars.  But, scientists have very strong beliefs that it may exist on Mars and other planets.  The type of life that may exist would be microscopic.
21383
I once read a theory that the universe is so big, that there's a chance that not only is there another earth somewhere, but there's probably so many that there's bound to be one exactly like ours.  The universe is huge beyond our present ability to comprehend, and it would be highly ignorant to think that with all the building blocks of life floating around out there that life doesn't exist somewhere else.  Whether we ever find it or not is another question.
18870
i guess u are asking about extra terrestials.\ni donot belive they exist.
993984
The search for extraterrestrial life is an ancient one. However, you must be specific in asking a question as this, because the question concerning 'extraterrestrials' has evolved gradually from "extraterrestrial intelligence" to "extraterrestrial life". Observe the news story at the link below, for instance. \n\nAlso, it has been mentioned that for a search of extraterrestrial lifeforms, scientists and observers should learn to broaden their point of view: not every lifeform will look like a human or an appletree. Such far-fetched ideas as "silicon based lifeforms" have been proposed -- of course, you are aware that we are all 'carbon based lifeforms'. \n\nIn short, has anything been found? It's hard to tell, but in all likelihood there is something out there. Its influence on human culture and history isn't hard to observe.
248125
I don't believe that there is any tangible proof that there are aliens, but I have always believed that there are. Just considering the amazing size of the universe, it seems unlikely to presume that there isn't other life out there somewhere, perhaps even "intelligent" life.
1098860
Using mathematics to determine the chances of life elsewhere in the universe, one estimate determines that there are approximately 10^75 advanced societies.  If true, then it is very likely that there is life beyond earth – even advanced life forms.\n\nSteve\n:-D
705988
My gut agrees with you, but I wouldn't jump to any conclusions. A sobering (and excellent) read is Rare Earth by Ward and Brownlee. One is an astronomer, the other a geologist. They make a convincing case that sentient life elsewhere in the universe is probably quite rare. At a minimum, they make minced meat out of the Drake Equation. Still, with so many possibilities ...\n\nThe other thing to remember is that first and possibly second generation of post-Big Bang stars could never have supported planets with life of any kind. It took billions of years before stars produced sufficient quantities of heavy elements that are essential for life.\n\nand, all those stars and all those galaxies don't exist simultaneously. As we look farther out into space, we are more and more likely looking at objects that no longer exist.\n\nso, having said all that, we must consider this. a) sentient beings are probably quite rare - whether you accept Ward and Brownlee's extreme argument or not. b) that life could only have existed for, say, the last 8 or 9 billion years of the universe's existence. c) the distances to other stars in our galaxy are vast, but the distances *between* the galaxies are mind boggling vast (there's a reason that even in Star Trek, with it's fantasy warp drive, the story lines are all confined to our own galaxy).\n\nJust food for thought.
46460
Nice answer Lawwwe...(not).\n\nOf course aliens exist - do the math. There are billions upon billions of stars out there. It's a mathematical certainty that there are other hospitable planets with intelligent life on them.\n\nTo all you churchies quoting the bible - there is more evidence that there are aliens than there is that there is a 'god'. You can believe in that, but not the probability of aliens. Please.
593865
I don't think a credible claim for seeing aliens exists.  Plenty of stories - zero real evidence.  \nDo they exist?  Well, I think the answer is probably.  There are so many zillions of planets in the universe, I would bet that there are others with life.  However, unless the time scale on which that life lives in FAR longer than ours, the laws of physics do not allow them to live nearly long enough to visit us.  It would take many millions of years to go out and visit these other planets - improve rocket technology even 1000x and it would still be thousands of years.  \nHowever - the possibility of us picking up some sort of radio signal from an alien world seems to be real.  No real hits yet - but it may happen.  We have conducted transmissions that have been sent to star clusters (containing millions of planets) which, if any have the same level of technology as us, should be able to pick it up.  Who knows.