I don't believe in evolution. There are basically 3 kinds of created beings: biological life forms created by God (Terrestrial or extraterrestrial), angelic beings that are spiritual but can take physical form (Both good & bad guys), and genetically engineered or hybrid life forms. I believe the grays are probably a combination of fallen angel and genetic engineering done by those who followed Lucifer. The evololtion angle they try to pass off on us is just another part of their deception