Comment Embryo (Score 2) 323
You don't have to print humans, just synthesize a memorized genome and throw it into an artificial womb. Done to death in SciFi literature and certainly within the means of 21th century technology. It's certainly interesting if a human raised entirely by a computer can really qualify as human.
And why do it ? Just to spread the human disease in the universe ? Why not simply send the artificial intelligence that is necessary anyway to make such a mission a success ?