- Ethics of Stem-Cell Research (Stanford Encyclopedia of Philosophy)
- A Moral Defense of Stem-Cell Research (Boston Review)
- New Extraction Technique that Doesn't Destroy Embryos? (New York Times)
[Clarification (New York Times); Quelling the Hype (National Review)] - Even Newer Technique That We're Studying (New York Times)
- Will Stem-Cell Research Help? (National Review)
- Selling Alternatives Short (National Review)
- What About Adult Stem Cells? (Weekly Standard)
- What Pro-Lifers are Missing in the Stem-Cell Debate (Slate)
- Embryo Ethics (Boston Globe)
