Those pictures are not proof that aliens exist. There is no proof that they exist.
By looking at the pictures you are only speculating.



I don;t usually do that, unless its an OBVIOUS fake, most of the time I take it as a real photo.
But what if these aliens were just a hidden race? Who have flying technology from the past? Isn;t that a possibility?

Well if you go in saying that a photo is FAKE, you will already be plagued by that mentality. But if you go in saying ok, I wil take this as a real photo unless the evidence says its not. You will have more going for you. Thats how I operate though.
And why do aliens have to be an accident? Im not part of any religion, but I think theories of the universe where a creator and science co-exist seem to make the most sense. So maybe someone created aliens?