Considering the size of the universe, it indeed seems likely that somewhere there is other life out there.

On the other hand, if current scientific assumptions like nothing being faster than the speed of light are correct, I believe none of us will ever meet an alien or at least have contact with one, so why even bother?

There is a mathematical probability that "life" as we know it exists or existed in the Universe besides Earth. You don't need to "believe" in that, it's a fact.
Now, "intelligent" life that one is debatable, but likely, depending on what one defines as "intelligent".
The one I don't "believe" is that Intelligent alien beings have visited earth. The distances are astronomical. The energy requirement will be substantial and will not be wasted on stealth missions.

Here in Holland we have similar constructions. A bit more primitive than Stonehenge in set-up, but the idea is the same. In fact, there are numerous places across the northern hemisphere where stones have been placed in such a formation. In my country at least, and I take it this goes for the others as well, these stones were proven to originate from mountainous regions around the north pole, moved across the continents by ice advancing over the land due to the ice age. People found them and probably simply rolled them on top of each other. Sure, this needs a lot of force and it probably took a long time, but you could think of ways to make it a little easier.

There are a lot of possible sollutions for how they did it. Like the Pyramids however, the process wasn't recorded (that we know of) so there's no way to varify one way or the other. That's why we don't know for sure. I've seen theories of people (a couple dozen per stone) lifting the stones by themselves, the use of oxes and rope, rolling them over logs and this interesting one:

I dont understand people not believing in UFOs...mankind 100 years ago thought it is impossible to go into space and look at us now. so why shouldnt there be another species out there that travels through space between stars and galaxies ? scientists actually expect in the next 100-200 years it possible for us to go beyond our own solar system and exploring new worlds.

@Allenmaher, no need to be insulting. Also I don't consider a link to a Wiki as proof anything. Modern engineers admit they coulnt not do a lot of that work today that was done 15,000 years ago, but you go on thinking you have all the answers and trying to talk down to anyone that doesn't agree with your opinion.

BTW dude, nobody suggest people didn't build them. What people are suggesting is they may have had help. It's funny how you want to tell me to educate myself but you cant even seem to grasp what is being said here.

Yes dude its a mesa surrounded by huge mountain tops. Its completely level with no excuse like erosion to justify it. If it was something natural the soil from it would still be present in the area. It isn't. You are arguing against things you obviously haven't taken the time to look into or just found the first excuse you needed to justify your stance without actually looking at all the evidence.

I would suggest you hit a library, learn what ancient alien theory actually is, also look into modern construction techniques and how a lot of the stuff they did, isn't even possible today with computers.
What about the aerodynamic pieces they have found scattered around the world depicting aircraft and those designs actually work thousands of years before the wright brothers flew? How did they come up with the battery thousands of years before anyone else? I am sorry the whole slave labor works for some but not everything. Humans building it isn't the issue. Its how the got access to tools beyond their time and an understanding of construction we still cannot replicate today?

You know, I'm one of those guys who says, hey, there may be some extraterrestrial live somewhere and we may have already captured "them". But from there we go, what now? IF these beings were so smart, how come they didn't just take Earth over? "Well Ljink, who is saying they are smart?" Well, any being that has the brain capacity to create a space craft that enters Earth's atmosphere without any damage... that's pretty dang smart. Coming from possibly billions of miles away?

I do think that there might be other life forms than humans. But those who are thought to be "close-minded" are some of the sanest people around. Who wants to waste time wondering about something that we can do nothing about. The Government will do what they will to keep our minds out of these affairs. My parents told me about a time... waaaay back where they were at a fair. They claimed to have seen a space craft of some sort and the police were there. And anybody who questioned what happened was taken by the police or told to shut up. It is things like this that are impossible to ignore ya know?

There are billions of planets out there, the chances that only one of those planets contain life, even intelligent life is unlikely

Religions tend to blind some people from science and openness. If scientist didn't question things then we would never explore, learn, and reach for beyond.

Just think were we would be without a space program - no anti lock brakes. Think of how many people are alive today because of anti lock breaks. No some people who slam on their breaks and stop before they hit something say, "Thank God!" When shouldn't they be saying, "Thank Science!"

The odd are astronomically small that we are only the life planet in the universe. But if you think you have all the answer, you never need to look.

The neolithic people not only could do this but the world is repleat with examples of them doing this.  Simple machines like levers, ropes, wedges, pullys, and rollers were common.  The Moai of easter island were much larger and carved moved and errected with far fewer people than 20000.  How do we know? Becuase there is evidence of how it was done.

Simply because you don't know how to move a really heavy object with simple machines and people power does not mean that it is impossible.  The largest stone could be moved with 500 people and no one would have to 'lift' more than 50 kg.  If they used smart application of force, rollers, levers, and so on, they would need a small fraction of that number. Habitation near the site shows more than enough manpower was present.

@listerofsmeg The ancient aliens series is one of the most thourougly debunked series ever to air on tv.  I do have degrees in earth sciences, and biology, and architecture and engineering (back when I was young and foolish and went in for such things).  My wife is an archeaologist and anthropologist, I have dabbled in it and worked on sites from Canada to Mexico.  I am in a library daily, at a university, where I am a researcher.  The disdain I show for the nonsense that the series spouts is well deserved.

You can't believe everything on tv.  Most of it is poorly researched, presented with considerable bias, not reiviewed by those who would know how to verify the claims, and presented for entertainment purposes.

If you google ancient aliens debunked you will find hundreds of links to sites in much every cliam the series makes is shown to be a sham... Or you could come to our classes in my department and we could give you a goud grounding in geology and geomorphology... or my wifes department where I can introduce you to some experts in a number of sites shown in the series.