Dude. You can't just make up your own definition of science and then go around labeling things "science" and "not science". Biology is a science. It's just a fact.

As for Aliens, I hope they exist, but I somehow doubt it. I'm not talking about fungus or bacteria, I'm talking full fledged intelligent beings. If they are out there, I don't think they'd be anything like us. If there were beings out there who are intelligent and have civilizations and cultures, I would be delighted. I think that would be amazing.