Oh my friend they do exist and there's plenty of proof. You're just not allowed to see it (or touch it for that matter.) There's literally thousands of species floating around much more advanced (and some just a bit more advanced) than us. Some humans have known about many species of them for many years and the technology to build this system, the computer chips and pretty much all of modern technology from microwaves to lasers comes either directly or indirectly via inspiration from outside.. including velcro.. the really good stuff has molecular hooks and eyes so small it creates invisible seams on alien spacesuits. I Shit you not !

Some species are groovy and quite like our music and sense of humour, others are so boring you wouldn't want a beer with one and they're so clever they see us like we see rats. good for experiments but otherwise just a nuisance.

Others are plain nasty and are so bad they don't even have a word for bad !

I hope this answers your question. If you are under 50 there's a good chance you'll live to meet or at least see a real live waving it's hands in the alien and yes it will freak the shit out of you, in fact you will not be able to think about anything else for about 5-15 years, but eventually you'll get over it, have a laugh about and wonder how thick you must have been to even question the idea

is there life out there.. life ? !! the only analogy I can make that might give some proper context is that we live in the equivalent of a drop of water at the edge of a pond in a small village just off the highway near kentucky and the real action is happening in Tokyo/

Shazbot