Will There Ever Be An Alien Invasion?

There is something I am always wondering about - do aliens really exist? Will there ever be an alien invasion, or do aliens already walk amongst us? After all the Star Wars, Alien series, Transformers, Star Trek, X-Files, one cannot help but wonder, how much of those are fact and how much are fiction? Afterall, do people really have such great imaginations that they can come up with such vivid descriptions of creatures from outer space?

If aliens do exist, which planet do they come from? What do they look like? Are they a lot like us, or will they come and harm us? Will they evolve and take us as slaves, or will they be predators and we are their preys?

These are all unanswered questions, and till now, no one has actually come up with anything satisfactory or to put people's minds at ease whether there are living things in outer space. Afterall, the entire universe is so big, who is to say there definitely are no other living creatures in space? Perhaps Earth itself is considered a "newbie", and there may be many other creatures in space with much more advanced technology than us.

So what if there ever is an alien invasion? What will happen to us? Is the end of the world coming then when that happens? I guess no one can ever know.