I think its the height of arrogance to believe humans are the sole sentient beings in the universe.

If Aliens exist we may be to inconspicuous to even be noticed by them .

It is possible aliens have visited earth in a way that we can’t detect

There is a possibility they exist but may not be recognizable to us as a life form or exist in a subatomic universe.

I believe it very conceited to think that this little planet, in this enormous place, is the only place Life has started. Think how the Earth is one grain of sand in the total of all on the planet.

I am not the main stream science minded person. There is evidence to support extraterrestrial life exist and even existed here on earth many thousands of years ago. I have an open mind to many possibilities. There is not an infinitesimal possibility but the numbers are so staggering that the human mind is simply unable to comprehend the chances of life from other origins than earth. And that is just in our own galaxy. Add that to all the known galaxies to exist and the number of galaxies that were before and the others yet to be discovered. The numbers are pretty good that life even far more advanced than our own exist. I find it arrogant and highly dismissive that we view ourselves as superior or even highly evolved and intelligent when we cannot even work together as a human race to unite, care for one another and advance our knowledge and explore the stars. We instead commit to greed, war and exploitation. We limit our own capacity of understanding to religions and medial causes instead of embracing our greatness. We are a petty selfish race so I would say that if there is Intelligent life out there watching they likely would not want to deal with the drama and violence our race is so prone to.

There are 1,000,000,000,000,000,000,000,000 stars out there. If one in a billion has a planet the right distance away from the star to support life, and one in a billion of those actually has life, that's still life on 1,000,000 different planets.

Inevitable. The Kepler telescope found enough that scientists estimate 50B Earth like planets in the Milky Way. Hubble saw enough to estimate 200B galaxies similar to the Milky Way. 50B x 200B = 10,000BB Earth like planets in the Universe (10,000BB = 10,000,000,000,000,000,000,000). It is inconceivable that Earth is the only planet with life.

I need more options. No evidence of aliens. Probability of life should be pretty high in such a vast universe, but no way to know if any developed and how far and if that life has already died off.

High likelihood that life elsewhere exists, low likelihood that its visited here yet unless earths own lives were started by panspermia, in which case we are the aliens.

The odds are high that there is other life in the millions of planets in the universe.

Well, If one goes by 'Drakes' equation, there is a strong chance that there is other life out there, but to what level they might be isn't so simple.

If you go by chemically, we are made up of the same main stuff that the universe is, so again the possibility does favor positively that there is more life out there.

But the notion of life out there being anything similliar to us is not too likely.
the human race being what it is now went through a LOT of changes to the planet, and the environment, and other species dying off. the list is very long.
the chances of having that happen again the same way some where else, is practically nill.

Who told ? Rats !

I am so surprised to read the comments on this post - pleasantly surprised I must add. So many times I read comments on this site that are not very open to anything that is not 100% scientifically validated

Seems a little arrogant to believe we're the only ones.

Intelligent life may be rare but the universe is huge. So alien civilizations are likely but the distances are too far.

Sure. But either the universe has not existed long enough so that anybody has advanced to the point where interstellar travel is possible, or all civilizations have managed to destroy themselves long before they advanced to that stage.

Aliens scare the crap out of me. I don’t believe in ghosts or demons or zombies. But aliens freak me the fuck out

There should be other options such as if they simply exist or don't without the earth thrown in there.

I love a line in the movie Jupiter Ascending, when the Earth girl says it's impossible that there are beings other than humans, the 'alien' responds, "as opposed to the idea that yours is the only planet capable of life in a universe that has so many planets you don't even have a number to count them?" (very possibly misquoted). My point is that we don't know nearly enough about the possible planets that might support life to be so smug about being the only ones who exist. I wouldn't be surprised either way.

"I want to believe in as many True things, and as few False things as possible." -Matt Dilahunty

There is no evidence that they exist, and no one has shown that it is true, so, no I don't believe they do.

I hope so and hope they have enough sense to stay away from earth. I would certainly avoid it.

Who could be so naive to believe we are the only beings in the whole universe.

I think they exist and have visited Earth. Do I spend money on that belief, or focus my whole being on that notion - hell no, but circumstantial evidence about ancient aliens theories and architecture/buildings, along with eye witness account from ancient civilizations plus present day pilots and missile silo officers puts me in the belief camp. I will add the caveat I could be 100% wrong.

Why absolutes?

Do exist? I don't know.

Are very likely to exist. Yes.