no thats imposible..
Why would it be impossible ? We hardly know what lies in our ocean, how would we know what lies beyond this planet ?
because I had never seen it
How about god, do you believe that he exists ?
I don't believe aliens, It's just human mind creation. GOD exists everywhere in everyone head who believe god. Real scientist will believe god, noob scientist will not believe god and real scientist still research and proof that aliens is fake. For me it's ridiculous if you believe aliens but not believe in God.