This is kind of where I am coming from, putting a HUGE emphasis on that specific definition...
I was shot down for posting about this earlier, but I believe it does have some basis regarding religion, atheism, ect.
Do most people of science believe that we are the only intelligent life in the entire universe? I can't seem to find specific data on this through web searches. I'm aware there is no public documented proof of this, but what about the Drake equation and other such theories? To me, it seems nearly impossible that we are the only intelligent life, especially considering how limited we are. It scares me to think that we might be the smartest things in existance, as we are pretty f***ing stupid when you look at the big picture.
We can dream and believe there are a multitude of species just sitting around on their home planet as well.
We can imagine there are species that have extended their presence into multiple star systems.
But that's all we have. There is constant research into the question of "are we alone?", and on that note, we continue the search for planets that can support our life. Scientists often think life like ours will require a planet like ours, but scientists speculate that life can spring up in a variety of places... though, they still look for basic things that water to support life.
For all we know there could be species out there that developed on a bio-chemical design very much unlike ours. The genetic design might not resemble anything we know, the fluid that comprises the cells and circulatory system could be of some drastically different composition than water.
But, it's all unknown.
This is something that has readily identifiable evidence, but it requires us finding it. We currently only have the capability to survey a very, very, very tiny fraction of our universe.. essentially, it's only the nearby galactic neighborhood.
There is a lot of "probability" factors that lead people to believe
something has to be out there, somewhere. Earth is essentially a product of chaos theory - we see everything now merely because we've been afforded that opportunity. We are the product of an unimaginable number of events that happened the way they did... some of us look at that as proof of design, others just see it otherwise.
Point being, everything situation has multiple outcomes, and one event at some point dictates the possibilities elsewhere. There is just so much "stuff" in the Universe, that everything is essentially quite random... some of us don't see it that way because we are here to think about it.
Side note:
We wouldn't even comprehend "life" had it not been for the creation of language. We'd just do stuff because that's what needs to be done to stay alive, keep others around us alive. We would have had no thoughts of "self", because we'd need to have a language in our heads to make sense of it. We'd think in pictures and abstract concepts, such as "this large stick can hit that animal with many teeth? And I can satisfy this aching stomach?" ... but of course, without the words.
With language, came thought, communication of thoughts, and eventually discovery of the value of self.
We have our ancestors a lot to thank them for. The only thing that separates man from other species is complex communication. Each generation learns of many previous generations, and thus progress is born. Without language, we'd be just another animal going about the daily activities needed to survive - hunt, gather, eat, sleep.