Noctilucent clouds, lens flares/reflections, lenticular clouds, ball lightning, military flares, high altitude birds, Brocken spectre, moon dogs, the first humans in the future to break the speed of light...
I always love this debate. You don't believe in UFO's, you see them. You can believe in aliens. The funny thing is, the stigma attached to the subject has become so strong that many people would rather ignore their experience than report it. Which is really sad. Even if they're seeing something perfectly plausible, why wouldn't you report it just in case? Also, if you are so, so convinced that extraterrestrials aren't real, then prove it. Why does the burden of proof always lie with those making the claim? I have yet to see any scientific evidence to denounce aliens and plenty of high profile people come out in defence of the phenomenon (Buzz Aldrin, Dave Grohl and the former defence minister of Canada to name but three). Just seems lazy to say they definitely don't exist without some sort of argument to back the claim up.
Because you can't prove a negative, so the burden of proof falls with those asserting a positive. It's just the way it is. In an infinite universe, there will most likely be life on other planets. At least one of those may have developed the ability to travel near us. They may visit the intelligent life on this planet, and maybe that intelligent life will one day tell us humans what they're like.
I personally think it's almost impossible that, of the billions of stars known and otherwise, only 1 would contain intelligent life. Its just a ridiculous notion. However I do not believe that intelligent lifeforms visit earth on flying discs.
The vast majority of people in the world believe in extraterrestrials. We have a whole culture based on the belief of a superior being. We fight wars in their name and knee in pray, swear obedience and some dedicate their lives to the worship of them. So why do we not accept that they in some form or other may want to visit us in modern times? Ghosts are an accepted part of the Christen belief , God, The Son and the Holy Ghost. There is no need to evidence their or discredit their existence. The reason is that the majority of people of the world do not need either. Sorry to bring religion into this, it is not a subject that we debate, but you cannot discuss aliens and discount it. Amen
It's very odd that there are so many people who've worked on government projects and claimed to have seen aliens yet it's still hocum in the eyes of those with 'common sense'. These are people who've worked on projects that would boggle the mind and yet it's totally unbelieveable to think that some sort of extra-terrestrial influence could be possible, despite what these people are saying. And these people aren't mentalists, they're incredibly intelligent, gifted scientists who just happened to have seen (or thought they'd seen) aliens. If you were going to take anybody's word for it, it would have to be theirs wouldn't it? You can disprove a positive though, which you never really see people do. You can disprove somebody's UFO sighting by getting concrete evidence as to what it is, but I've never seen anybody step out and disprove the existence of aliens or likewise. Yet people who see them are apparently crackpots. Intriguing. Also, why is it when soembody sees something unknown in the sky over America people suspect aliens, but if it's something over Hull there must be a scientific reason for it? Are aliens exclusive to America? Personally I think if there are other beings in existence, they travel extra dimensionally and while in our 'universe' they travel linearly via gravity manipulation. But you know, I'm a crackpot for theorising such things.
It's to be hoped that the government doesn't decide that aliens do exist...they'd spend a fortune trying to bomb them !
One of my favourite old-school thrash tunes is about Hangar 18 in the US where they are supposed to have stashed a few UFOS replete with little Green men!
No kidding, the best of it is the club didn't even try to hide it with some of them. My favourite is still "he's got great pace, so when he makes mistakes it usually means he can get back to recover them" from the press conference unveiling the signing of a new defender.