I'm going to explain this as clearly as possible.

You are a dumbazz.

Anyone that doesn't believe in alien life froms has a valid point? Not at all. There are so many stars and planets out there just in our galaxy. The idea that not a single other life form exists is beyond the stupidest thing anyone could ever think.

Secondly, no sh!t UFO means an unidentifiable flying thing. But it's like the other guy said, society associates "UFO" with alien spacecraft a lot. Get used to it.

I will always stick to my view over this, which is I will not believe this until I see it with my own eyes.

Its like most things, you have to see it to believe it and of course, I have not seen one so I don`t believe, but some of the sightings and speculations seem rather paranormal. Such as the one in China where all the Airports closed down due to the lights and engines been switched off and then seeing this 30 minutes later over the top :

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Other images which seem to be pretty legit, if not, a very huge Photoshop nerd :