Is there intelligent non-carbon based life forms in this galaxy?
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!
838820
Hi. I do not think so. It may be possible that life forms unimagined may exist (I'd be surprised if they didn't) but they would still need to be based on something other than vacuum.
857433
Yes, all life is based on carbon.  All living systems have carbon compounds in them.\n\nBecause carbon is unique among the elements in forming long complex chain molecules it is generally believed that any life we find in the universe will be carbon based.  This may not be true if electronic only forms of "life" are found.
1123060
Maybe somewhere, we will probably never know! There is a high chance that in another galaxy though that there is another inhabitable planet similar to earth with life living on it, i cant believe that it has only happened to one planet in one galaxy in all of space! That would just be madness!
1005881
There are _trillions_ of stars in the Universe.  Our galaxy, the Milky Way, is composed of 300 - 400 billion stars.  There are _billions_ of galaxies in the Universe, many dwarfing the size of ours.\n\nThe chance of other life _not_ being out there is so close to zero that it can't even be calculated.  There are infinite possibilities in this Universe, and we haven't begun to study more than a tiny bit of them.\n\nTo anybody that has the audacity to say "no" there isn't, then get an ego check.  We aren't the only intelligent life in a Universe of infinite possibilities.
193508
There could possibly be. Isn't it a little ridiculous to think that in all the galaxies that we are the only humanoid lifeforms? whether or not you believe in God!
65576
Not yet. Organic molecules, considered as precursors to basic life forms, have been found throughout the Universe (mostly in comets, interstellar gas and dust). Experiments show that some bacteria and archaea can survive the severity of outer space. So it's quite possible that we find living organisms in the future, most probably on other planets.
328025
Absolutely! The odds that they exist are overwhelming when you think of how GALAXIES are scattered like specks of dust!\nNow... even though aliens exist, what are the odds that they are on another planet in our galaxy right NOW? Think about it... It took 50 million years for humans to appear on Earth. How long will we be here?... only 50 to 100 thousand years (hopefully)? How many other planets will bring forth intelligent life - not a whole heck of a lot. And of them, when will that life be around? Just a tiny amount of relative time.\n...What I am saying is that EVEN IF other civilizations were, are, or will be... the timeline of the universe is too insanely long for any of us to be co-existing. The reality may very well be that we are currently very alone here in our time and place. I hope this gives you a new, more realistic way of seeing things. Sorry it's such a downer, though!
632331
Yes, but not only that, planets in this galaxy, and also planets or moons in our solar system. Intellegent life, perhaps a great deal more rare.\n\nIn our lifetime (well, you younger ones anyway), I predict we will learn that Europa, Titan and possibly other moons sustain simple life forms. Extreme biology on earth has demonstrated that all simple life needs to survive is an energy source. It doesn't have to be the sun. It can be thermal venting or friction from plate techtonics. It exists under the ice in Antarctica and miles under the sea in pitch blackness.\n\nLife- ubiquitous. Intelligent life - far less so.
807557
It's hardly surprising that we can see no sign of life out there.  Views of Earth taken from unmanned explorer craft like Voyager taken from within our own solar system show no signs of life either. If you can't see elephants, whales or even forests from only a few million miles away then looking at hazy dots that are planets thousands of light years away expecting to see obvious signs of life is a bit optimistic.\n\nIn addition, given the size of the Universe we can hardly claim to have looked everywhere whilst at the same time it seems inconceivable that some form of life has not evolved somewhere else.\n\nSpectroscopic analysis of stellar nebulae and other "gas clouds" in deep space has revealed the existence of basic organic compounds such as amino acids which are regarded as fundamental building blocks of all living things here on Earth. So if life itself hasn't been located elsewhere, some of the prerequisite precursors certainly have.\n\nThere are also several "fossils" found on meteorites believed to have come from Mars which may or may not prove to be the remains of living things which originated on Mars.
17615
A better question might be has there been, is there now or will there be intelligent life somewhere in the universe (other than humans)?\n\nThe earth is about five billion years old with perhaps another five billions years to go and human life has existed here perhaps a million years.  That is a tiny fraction of time and other life forms may arise here that are intelligent sometime in the future.\n\nFor outer space the prospects seem even better since there are perhaps millions of gallaxies with billions of stars each that have existed at some time in the past ten billion years with perhaps as much time left to go.  In fact there exists the possibility that life much as we know it, including DNA (a chemical compound though highly complex) may have existed millions or billions of years ago before us and are now extinct.  It takes so many light years to communicate with any other star within our own galaxie (except the very nearest) but it is impossible to reach anyone from the past.  And if we send signals into the future, we may be gone before we receive a friendly reply.
18724
hehe...I dunno...how do you spell intelligent?  ok, that was mean, sorry...I think there has to be intelligent life out there somewhere...it's not very plausible that this one tiny little planet is the only one that can sustain life in the entire universe...
229333
No. There would have to have been millions of years of carbon-based life. That's one of the reasons oil is referred to as a "fossil fuel"; it really is one of the byproducts of the biosphere.\n\nThere's no evidence of life ever having existed on the moon, and no evidence yet of any on Mars - now or in the past.
177128
they probably wouldn't look like us. It's very unlikely another planet would have developed just like earth, and its possible that other life could be silicon or nitrogen based instead of carbon based like us. The most likely scenario is that aliens look different because their world evolved differently. So to answer your question, no probable not.
383399
A recent scientific study estimates that there are AT LEAST 70-sextillion stars in the universe, one of which is of course are own sun. The odds AGAINST none of those other stars having planets occupied by sentient life are astronomical (pun intended). Undoubtedly of all the life forms that exist in the universe some are technologically at the same level as we are, while others are at least several thousand years ahead of us. Still others might be where we were 3-million years ago---just down from the trees. Certainly, any alien life with any intelligence at all must wonder if there are other life forms somewhere other than their own world.
282593
I do believe it. For one, the universe is absolutely massive and there are billions upon billions of solar systems that we have not discovered. Are we so conceited to believe that WE are the only intelligent species in a universe where there are billions of planets? The probabilities are extremely high that there are a number of other intelligent species. We just haven't found a means to detect them or communicate with them yet.
368791
Are Humanoid aliens real?  Are Silicon-based aliens real? Are Methane-based aliens real?\n\nIn science fiction, anything is possible.  In real life, we have not encountered these beings yet.\n\nReptillian aliens are possible, but I would assume that alien beings evolved in different ways that life on earth, so there might or might not be any remote similarities......