If mankind ever succeeds in creating life from scratch, without starting with living material... it will, indeed, be an act of science. It will require tools and technology when and if it happens. To do it without tools, as you say, with nothing but his hands and mind... would be magic... and magic is not real.
Doing so would not prove that there is no god who did it first and did use magic, but it sure would support the idea that no such being was ever necessary in the first place.
Doing so would not prove that there is no god who did it first and did use magic, but it sure would support the idea that no such being was ever necessary in the first place.