I think morality absolutely should set limits for what type of research is done. Nazi doctors didn't "let morality get in the way of research" but we have higher standards, thank goodness. Many medical mysteries could be solved if we were willing to kill a few people along the way, but we don't do that. Again, thank goodness.
I'm also really glad we're looking for "alternatives" because quite frankly, our current stem cell lines simply don't work that well for research purposes, so fighting to work with them more wouldn't be all that productive.
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