what r the odds that life only exists here on earth and nowhere else in the entire universe?
547669
The mere thought that life ONLY exists on Earth and nowhere is ridiculous!!!! For every star you can see in the night sky, there is a distinct possibility for planets and intelligent life.....why else would they be there?
503194
There is a possibility of other living matter existing other than the humans.There are billions of stars and there may be many more earth's around them.When the conditions of existance of life prevails ,like for earth -water,atmosphere,essential gases and many more exist.Ofcouse there may be different conditions in other galaxies but there is a possibility that life exists.Them being friendly or visious depends upon the way we try to communicate with them.If the way we communicate is wrong they may prove to be more visious than friendly.
427364
there hasn't been any found yet.... but... the possibility of life on other planets is very  high....  :)
407975
Very little chance, considering most life will not exist outside our solar system from the huge heat of the planets.\n\nOHANDPOSTINGINCAPSLOCKSWITHNOSPACESMAKESYOUREALLYMATUREIMSUREYOUHAVEAHOTGFANDARETOSEXYFOREVERYONEHERE!!!
227240
With billions of planets out there it would be naive to think we were the only life,, as for abductions although possible I seriously doubt it..
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
212132
most scientists agree that it is only mere human egocentricism to believe that in the vast expanse of the universe we are the only form of intelligent life, on this microcosm that we like to call Planet Earth.\n\nthe probability of life existing on only one single palnet is unbelievably low..in about 99999999 cases out of 100000000 life evolves in more than one planet, in most case within a few light years of each other on an average.\n\nit is a fair assumption that our universe contains life within a range of a hundred or two hundred light years from here.\n\nas for contacting aliens, it is definitely possible..no civilisation can develop without trampling on common properties of the universe like radio waves,etc. hence we are already concentrating our efforts in this direction since around the '50s , trying to listen for any regularities in the radio wavws that we recieve from the universe..and sending out our own messages in the hope somebody will listen to them \n\nthe difficulty lies in speed..radio waves travel at the speed of light and you can't get faster..but this means that it will take a message sent now from a planet 200 light years away, two more centuries to reach us..but we are still in with a good chance of intercepting such messages..
1049105
Proof, so far there is none, however if you take into account that there are trillions of galaxies each with trillions of stars all of which may potentially have planets, then you have to consider that there is a good chance that there is at least one other planet out there with the potential for life.
611976
Definitely.  Even if its just some microbes out in space, just the sheer number of planets and stars etc I would think there would have to be other life out there!
666417
Probably not.  That doesn't mean that we are the only life forms in the universe.  It only means that the probability that these life forms advanced to intelligent life, and have developed the technology to visit us is pretty slim.  Life on earth as we know it could be destroyed by a single meteor.
83664
If you rely on the law of probability, then my opinion would be yes. This of course has not been proven, however, with more than 16 Billion other stars such as our sun in the Milky Way Galaxy. Let's say only a quarter of them have stable planetary orbit systems. That is still 4 BILLION opportunities for life. Now if we broke that down and said that only 1 % of those solar systems had a chance for intelligent life of some sort, that would still be 400,000 opportunities! I am speaking of our galaxy alone. There are 250 Billion Plus other galaxies with similiar potential. Alone???? I think not!
414226
Yes, there has to be.  The universe is immense with many galaxies, and many suns.  There must be a lot of similar planets out there somewhere, why should there be only Earth with life?  We might never meet any extraterrestrials, probably aren't supposed to, which could explain the vast distances.  Some other beings exist now, or were extinct eons ago, or are yet to be.  I think they are a lot like us, not made of electricity or silicon, or in only two dimensions like some sci fi.
1071064
Absolutely not and I think it would be incredibly arrogant of us to think we are the only life in the entire universe, considering how many billions of planets, if not galaxies, there are.  There are more that can sustain life.
184609
I do think there is a very good chance, statistically, that life exists on other planets. As I stated in a question very similar to this one, comets contain organic-like compounds that could be the building blocks for life, and such comets travel among two or maybe even more stars in a galaxy (interstellar comets).\n\nAs for watching us from above; the only things watching us from above are birds, flying insects, stuff in trees if you happen to be under a tree, people in skyscrapers if you are below a skyscraper, people in aeroplanes, satellites with Earth-directed sensors, etc.\n\nDeities, aliens and Jesus (which all may be one and the same) are probably not watching us from above or at all because they probably don't exist and if they do they probably have not discovered us yet because most complex forms of life on Earth are young relative to cosmic distances (which are measured in time). But it's as false for me to say "I know for a fact that aliens aren't watching us" as it is for anyone else to say "I know for a fact that aliens are watching us".
1015597
I don't know for sure but the universe is just too freaking huge for humans to be the only life form in it.  So I believe that alien life forms have to exist out there somewhere, since the density of life through the universe has to be greater than null.
671308
Of course I think life exists!  Infact, I beleive there is life in the solar system.  How do we know if there isnt life floating in the clouds of a gas giant, or icy crystal like things on pluito?  We havent searched hard enough for these yet!  Duh!\n\nLife outside of the solar system might be a little hard, considering that there are only "hold jupiturs," and "frozen earths."  Both are to hot or cold to support life, and they are massive and have insane gravity.  However certain single celled organisms, say bacteria or such, might reside on the planet.  I always thought that might be.\n\nIn addition, Europa, a moon of Jupitur, has ice flows on it that scientists think liquid water might reside under!  It might be interesting to see what could live there.  From the means of life there, I came up with a skating green creature who could move around on the ice, absorb the moisutre of the water, and undergo photosynthesis to obtain energy.  \n\nEnjoy!\n\nNote: I do beleive in aliens, but dont beleive in UFOs.  Considering how many hot jupiturs there are, I dont think we will even see any life as smart as we were as cavemen until alot later in time...
270604
Yes, I think it is possible.  We live in such a great universe and there is probably another life form out there.