Does life exist on another planet, do they live like us?
724199
So far we've seen no verifiable evidence of other sentient species. That said, I believe with some certainty that somewhere in our galaxy at some past, present, or future time, a sentient species did/does/will exist.\n\nWhy haven't we heard from them?\n\nPerhaps they are not technologically advanced enough to be heard. They may be mastering stone knives right now, or experiencing their own Rennaisance.\n\nPerhaps they are here right now. Any species sufficiently advanced to travel interstellar distances would be able to hide or masquerade with ease. That Boeing 737 that just flew by may be a surveillance craft.\n\nPerhaps they are so far away they will never notice us and vice versa.\n\nPerhaps they existed a million years ago and died out.\n\nPerhaps they will exist a million years from now.\n\nIt is really impossible to know for sure.\n\nThe Drake Equation suggests that there is sentient life out there. The Fermi Paradox casts doubt. Play around with the calculation form at the second link and see what you think.
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.
332737
This is interesting question. My opinion is: why not!! Maybe some forms of life that we don't know. There is some life forms even 11 km under the sea, under extremely high pressure. Some kinds of bacteria live without air too. Fish don't use the same air like us, but they are alive. There is so many different forms of life even on planet Earth, so why not on other planets? After all, if we did not see something, don't mean this don't exist!
765259
No, there is almost certainly life within the Universe besides Earth, and there is certainly life within the Milky way besides earth.
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.
27853
Since there are so many planets out there, and we only know so much about our own solar system, and then there are all these OTHER solar systems out there, it would be almost silly to presume Earth is the only one w/ life.  But are there aliens out there that look like Hollywood aliens?  that's probably going to remain an open question!
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?
1112285
Absolutely.  There's evidence that planets with attributes similar to Earth exist.  In fact, scientists recently sighted a planet in a star system close to us that seems very similar to Earth.  Now UFO's are a bit more dubious, but then humanity has only been around for 20.000 years (maybe 50,000, depending on who you believe), while the universe has been around for at least nine billion years, and maybe up to seventeen billion (though I think that's probably stretching it a bit).  I would say there's been more than ample time for more advanced lifeforms to appear in that timeframe.
513472
if they are living on a planet like earth, ver close, if they are living on a very different planet, not very close
553451
Life exists almost everywhere on earth, and it has many forms.  Some of which are almost impossible to detect and it's debated whether they're actually "life" (like virii).\n\nIf it could be proven either way, I would bet my worldly posessions and my right arm that there is some sort of life beyond Earth.  They might not be carbon-based or water-based, but I am certain that there are objects out there that consume things, grow, reproduce, and possibly defend themselves or even have rational consciousness.\n\nAs for some alien being looking just like a human and living among us, that's a different story.  I can't see two independent strains of life coming out so similar, especially considering the variety right here on our little planet.  Either we'd all be from alien roots, or the "aliens" would have originated from earthly roots.
47051
not in our solar system. \nBut you also have to remember that even if there is life on other planets, we are assuming that they are as advance as we are or more. Could it be that maybe they are in a pre-industrial era and have no means of space exploration?
362430
I think we would be very naive to believe we are the only life form in the universe.As vast and diverse as it is,I believe there has to be a reason for the formation of these planets to sustain life.That said,who knows when the life was present on these planets?And who knows what life forms are out there as we speak?Perhaps Mars and Pluto had life trillions of years ago but there are no remnants now for us to find.It's a fascinating topic.If you think about the possibilities,it's incredible.
206523
I'd imagine there is.... the universe is way to big to assume that we are the only planet with 'civilized' life on it.\n\n& really... are we THAT civilized???   :P
356008
At the present time, we just don't know.  If you saw pictures of aliens, what you saw were fake.  Nobody on earth has yet to produce a verifiable image, photographic, electronic or hand-drawn, of a living creature that originated elsewhere in the universe than from our home planet.  Nobody.\n\nAlso, at the present time, we suspect that there is no other planet in any nearby solar system that's host to a sentient race of beings like us.  That does not mean that some form of what we call "life" is impossible, but just think: out of the billions of living critters that now inhabit, or did in the past, our home planet, only one of those life forms evolved to the point where it (us) can even begin to think about such questions.  That by itself will tell ya we're sorta unique! ;-)\n\nIt sure would be interesting, wouldn't it?  But imagine if you will what it might be like if those alien creatures we fantasize about were an advanced race of carnivores that look upon us as another breed of cattle, fit only for eating!  Yow!  Or, how about if they were friendly, warm and fuzzy folks who just love to make nice with us - but they carry an infectious disease that there's no cure for.  Oh boy.  Or maybe, like Darth Vader, they just consider us a nusiance worthy of one blast from a super-mega cannon that blows Earth into dust?  Whoa!  Hey dude: you SURE you wanna meet aliens?  \n\nAll this is just idle speculation.  The hard fact is, even if there were creatures just like us somewhere in the universe, we are not gonna know about it, because the distances between them and us are just too great to permit interstellar travel, the hazards of such a trip are insurmountable, and no means of communication can travel fast enough for us to hear from them and be able to answer back.  Kind of a bummer, isn't it?
912860
I highly doubt that there is intelligent life in our solar system there might be organisms on other planets like Mars. But there IS life some where out there. The Earth is infinately small compared to the the universe because the universe is forever expanding. There is no telling how many trillions and trillions of planets have intelligent life roaming around wondering if there is life on other planets just like we are.
490970
The Planet in which we all live on.
249308
Sure why not.\n\nJust look up in the night sky. There are so many starts we can see, and untold planets we can't. This is just one galaxy. There are so many more out there in the univers. It is really silly to think that with all those planets, ours is the only one that has life.\nOur planet is still a young one. I'm sure there are life forms on other planets that have technology we can't begin to comprehend