Stem cell science: current ethical and policy issues.

There is increasing support for embryonic stem (ES) cell research on both sides of the Atlantic. In the United States, the outcome is more funding from non-federal sources, despite the current administration's opposing views. In Europe, a similar pragmatic turn is in the making, but the future is still uncertain. Acceptance of ES cells is mitigated by the uncritical belief that their use is ethically more suspect than is the case for adult cells.