Chasing Miracles

The author wanted to know why the stem-cell treatments that worked so well for her hobbled dog aren’t being used to put the spring back in humans’ steps. Researchers at Penn’s Institute for Regenerative Medicine explained—and shared some of their own, measured, progress toward successful therapies.

Promise and Politics

While the bioethical debate over stem-cell research rages on, Penn scientists are making progress using adult-human and animal stem cells—and hoping for broader future support for studies using embryonic stem cells.