If you believe there is, do you think ET has visited Earth?
I just finished watching a Science Channel program on the subject and thought it would be interesting to hear what folks here at C&F thought about it.
I think they’ve been coming here doing rectal probes on drunken rednecks in pickup trucks for the last 60 or so years, but all they’ve learned is that about 10 percent of their specimens don’t mind that one little bit.
Yes.
No.
Wow. And here I thought the rednecks were just having wood-alcohol-induced hallucinations. 
As for life on other planets: probably… somewhere… in a galaxy far, far away. But they’re probably not humanoid, and not necessarily intelligent or even carbon-based. But I could be wrong. 
A more pertinent question is would we recognize it and/or visa versa? Our species has long been plagued with acute tunnel vision in matters of recognizing and respecting intelligence different from our own.
Makes it really easy for those litle buggers to scamper about undetected.
Seriously, mathematecally speaking, the overwhelming probability is that we are not alone.
Something to ponder:
“In this galaxy there is a mathematical probability of 3 million Earth-type planets.
And in all the universe, 3 million million galaxies like this.
And in all of that, and perhaps more, only one of each of us.”
Dr. Leonard McCoy
Star Trek TOS
Dolphins and white mice. 
White mice are some of my favorite things.
I think Carl Sagan said something about the problem being that there were very clear reports of sightings witnessed by single individuals, and there were very fuzzy reports of sightings witnessed by groups, but there had never been a clear report of a sighting witnessed by a group of people. And then there’s always the hoax problem.
I myself can’t conceive of life on other planets, just can’t do it, but that doesn’t mean it isn’t possible. I mean anything is possible somewhere I guess. But if the universe is infinite in size, then it just seems sort of meaningless to even think about it. Although I can see the attraction in wondering, just like I wonder about other things.
I haven’t heard of any evidence that makes me think our planet has been visited.
I did let that SETI project use my computer when I had one that I could leave on. I really was not interested in the project so much as the idea that ordinary computers could be joined together to do a project that no single computer, no matter how huge, now existing could. That was really neat. None of the radio signals my computer analyzed had anything unusual about them. I was so disappointed.
Why limit yourself to planets? I strongly suspect that just about anywhere you look, you’re going to find some kind of life…if you can learn to see it, to recognize it, and, perhaps, to live over the experience.
I would suspect even here on earth, the place we think we know so well, there are kinds of life both large and small which we coexist with but are simply never aware of.
But be careful…if you learn to notice them, they may notice you. 
–James
Hey. Wait. How did you… Uh.. Hey. SHUT UP!!!
I’m not “conceited” enough to think there’s only “us” (plus I hope somewhere life got it better then it seems to have done here!).
Is it humanoid? Maybe, maybe not. Heck, it may not be carbon based!
But as someone who loves science fiction, there are just so many theories that could be possible - from the idea that mitochondria are really an alien species, to humans being an alien species. I think one of the most fascinating stories of a alien / human interaction is “Childhood’s End” by Arthur C. Clarke.
As to whether “they” have come here, perhaps. If they have, and with our history of destroying anything not like “us” - they are pretty darn smart by not announcing themselves.
Klaatu barada nikto
Possible? Yes, no question about it.
I question more the truth about our lunar excursions than other lifeforms visiting our planet.
“It’s gym life, but not as we know it…” 
That one took me a few seconds, Steve. Nice one!
djm
As for myself, although I too get a chuckle out of UFO abduction stories (your post cracked me up, gonzo. Your response did, too, Dale. ) and the like, I’m open to the possiblity that life exists outside our solar system, maybe within our own Milky Way galaxy. I also think it’s possible that multicellular (or multiwhatsits) life forms exist somewhere out there.
I also believe that technologically advanced ETs we’d be able to communicate may have already vanished from their worlds, just as we as a species may someday vanish from ours.
Thanks to all who responded.
Life on other planets? At 55, I have enough to worry about just pondering as to whether life still exists below the waist… 
I still dont’ get it… 
As to the question- no argument’s ever convinced me either way. I tend to say no, if mainly because the argument most people throw at me is the probability argument, and I don’t think that holds, simply becuase we don’t have enough information on other planets, or even about our own planet to say. But that’s not really an argument against it either. My only scientific argument against it would be that life is so complex it would be hard to simply devlelop anywhere else, but that’s assuming life is chance- I believe in a Creator God, so I don’t think that life is chance.
But then, can’t God do whatever He pleases? Of course. And I can’t put any restraint on Him there. It’s just a gut feeling of mine that there’s no life on other planets, and I dunno if taht gut feeling comes from me or God or Satan or wahtever, so I’ll just go with the flow, lol.
When you talk about life, I figure it’s pretty much everywhere. That’s because I don’t think there’s anything particularly unique about where we happen to be.
When you talk about intelligent life, that’s an entirely different matter.
Before attemping to resolve the question as to whether intelligent life exists elsewhere in the universe, a perhaps more pressing question is whether or not it in fact exists here.
–James