I believe life must exist in one form or another on another planet. Intelegent life like us? Maybe, maybe not.
With 10^21 stars or whatever there must be life. Ameaoba, germ, something. it has to be there somewhere. A spore of some sort? Who knows.
Even though there are 10^21 stars, I don't know if there is life like us. Why? There are so many forms of life on this planet (Earth). How many species? Trillions? Quadrillions (or whatever). One of them knows how to make complex things(cars, boats, planes, etc). I don't know if monkey in the wild make tools, but I doubt it. Maybe it uses a rock to break a nut open. So the leap to humans is a gargantuan one. Hell, compared to monkeys, even the concept of shoes is a giant leap.
As for UFO's. I'll believe it when I see it. There's no reason to debate it with all the black projects our gov't has going on. Chances are UFO's are just secret military vehicles. Remember the triangle shaped, silent, black UFOS? I do. Where'd they go? Oh ya, the government made the B-2 Bomber public knowledge. I see a strange corelation. Oh, most of those sitings were over area 51...a top secret military base. So, no, i don't beleive in UFOs and won't until I see one for myself and meet the pilot. Opon meeting the pilot, that will alleviate any doubt I have about intlegent life outside of planet Earth.
Here's the scary thing:
What if the leap of intelegence of an alien specieis over us is equal to the leap of intelelegence from monkeys to us? What's that make us?