“Although it does add in plenty of unbelievable elements (such as a galaxy littered with aliens that look more like us than we look like chimpanzees, our closest relatives)”
ST:TNG addressed this in one episode, discovering the origin of genetic material which was dispersed across the galaxy and mutated into the humanoid forms featured in the show.
ST:TNG addressed this in one episode, discovering the origin of genetic material which was dispersed across the galaxy and mutated into the humanoid forms featured in the show.