Maybe it's just me, but if one takes evolution, and everything else into account, it's about 100% certain there's other life out there.

However, my question is that if there is sentient life out there, it must be vastly more advanced than us such as these said aliens.

But here's my problem: life is very old (supposedly), and despite humanity only having been in the "current evolutionary stage" that it's been in for 10,000 years (only a small niche in the spectrum), yet already have space flight, why the crap aren't there huge alien warships patrolling the milky way, dominating the entire universe, including ours? Yes, there are billions of planets out there, but there are (supposedly) billions of years for a given empire to build, expand, and take over the galaxy.

Heck, in 1000 years where will Terrans be? We have 7b+ people on one planet, and are growing rapidly. 100 years from now, we'll have colonies on every planet in the solar system. In 250, we should have mastered FTL, and expanded greatly. And that's just 250 years - again, why shouldn't aliens be so big and advanced, they should of made *real* contact by now and not some wierd clandestine secret black-op meetings with the government.

Do I believe in aliens? Yes. I've (litterally) seen a real UFO and had an ecounter of the second kind (visual and audio). But I think there's more to it than everyone assumes than just the clandestine crap.

@mrstickball
Maybe they're not THAT advanced maybe to the point of exploration ships but nothing in the means of all out war ships, I mean Europe discovered America before they blew the Indians off the map, same could be said for extra terrestrial life. I know it's been years since things like area 51 with the UFO and if they're that advanced they should be able to take us over in a matter of no time, but maybe their culture is peaceful and don't believe ours is, maybe their technology is stagnating and no major advancements to bring said warfighters, maybe they're waiting for us to develop more to bridge the gap so we might aid each other, last thought might be we are not important to them but keeping an eye to make sure we're not a threat.

@Kn,

Let me first say I largely agree with you and that I'm not trying to imply that you're conclusion is wrong. But our solar system is not infinitely small as that would literally make it a point in space. While it may be true that figuratively speaking we are a point in space, mathematically speaking we're definitely are more than that.

@Everyone,

What Kn touched on is called the Hubble limit. Its a simple concept and one that can be explained for everyone's benefit with a bit of precursory knowledge. First of all understanding that at the beginning of the Universe space expanded rapidly is important..in fact space expanded at a rate that that was technically faster than the speed of light (aka superluminal) but it did so through a clever loop-hole that leaves Einstein's theory safe for now. Now as the expansion slowed down the light leaving the newly forming galaxies was finally able to overcome the rate of expansion and actually reach other galaxies.

Keep in mind that the further something is away from us the faster it is moving away from us due to expansion (a byproduct of the way expansion works from within the universe and not on the edges) and as a result there are galaxies moving away from us faster than the speed of light still today.

@MrStickBall,

Your technology timeline is one of the most optimistic I've ever heard...I hope you're right though =)

 Lol, I knew I shouldn't use that word.  I almost changed it but thought it was metaphoricallly safe.  In reality of course we are not infinitely small -- rather we are exceptionally small in the grand scheme of things and, as you said, a point in space.  To any distant civilization that may or may not exist, our Sun is but another of the trilliions of stars making up the universe.

To answer the question of why we haven't seen aliens here on earth (assuming they have evolved sooner/faster) has a lot to do with chance as well.  Pick a spot in the universe.  Any spot.  The Universe is your Oyster.  You have figured out FTL travel.  Which star to visit?  There are only a trillion or so.  What are the chances that any given alien civiliation just so happened to pick our Sun as a possibility?  Even if they picked our Milky Way, there are still billions here alone...  And that's just the Milky Way "Zip Code" 

war of the worlds made me believe aliens are true.

im jking but i seriously do beleive aliens exist, theres proof but im too lazy to copy and paste it.