Despite celebrity endorsements and controversy surrounding embryonic stem cell research, the best promise for medicine lies with adult stem cells, says Verne D. Hulce, executive director of the Field Neurosciences Institute in Saginaw Township. Politics too often trumps science, Hulce said this week in a talk to members of the Saginaw Club. Hulce leads and develops research at the institute using stem cells to treat traumatic brain injury and Parkinson's and Alzheimer's diseases. "Most people, including politicians and lawyers, know nothing about stem cells but all have an opinion, which can get in the way of science," he said. President...