Mentat, FZ+ ;
I think that, of course, ethics present the boundaries that can be best utilized by science. Particularly since using ethics facilitates a successful exploration and the most productive and least-infringing transendance of a boundary(ies).
As I've said in the Ethics thread, the success of an individual's (or corporation's) endeavor depends on how much of a success it will be for everyone and everything else concerned. That's ethics. And ethics is full of boundaries. Insulation so to speak. Yet, ethics facilitate the crossing of boundaries as well.