I'd like to share a quick quote. Not sure who to credit it, but it goes something like:
"There are only 2 possibilities in this world that we exist in.
1. We are either alone
2. Or we are not
Both are scary."
Now that is a very scary thought, and I am leaning more on number 2, which I feel to be the LESS scary of the two.
Anyhow, the many people that deny the possibility, let alone the probability, of there being some other form of life in existence somewhere, are extremely ignorant and closed-minded.
If any of us really knew how big the universe is..oh wait..we cant because its so large that your brain cant even fathom it. No tool of measurment that your are familiar with would do it justice. Even if some said "X amount of earths=size of universe" the number of earths would be impossible to RIGHT DOWN in your whole lifetime. Think about that.
And keep in mind there are multiple universes, and a popular belief among highly intelligent scientists (which by the way are really the only people thats opinions really matter in all this) that there are multiple dimensions. If even ANY of this is true to the SMALLEST extent, then no, we are not alone.
I would love to get into more, but I will seriously type until my fingers bleed by the time I am done expressing my own personal opinion, which much of so is based off of fact. I do like to throw a little philosophy in there though, it makes things fun, as long as you can differentiate between the 2.