Global efforts to fight diseases and reduce human suffering should not be put on the alter of "slippery slope" politics or absolutist ethics.

The issuance of a temporary injunction barring the NIH from funding human embryonic stem cell research should hardly have come as a surprise. Many of the same plaintiffs and much of the same legal team filed a similar lawsuit a decade earlier.

Our collective experience of the stem cell controversy has been instructive in yielding an approval process that will allow the science to move forward in way that deserves the nation's trust.

Frozen embryos, like waffles or fish or my old Dell, are only good for so long. You can't just keep them in the freezer forever with the assumption that, once you need them, you can scrape them off and use them.

The president has not explained precisely why he opposes reproductive cloning. Is his opposition solely based upon the health risks of cloning techniques, or on moral grounds?