Pulitzer Prize-winning biographer Jon Meacham on the evolution of Abraham Lincoln's moral principles and political leadership -- and what the era of Lincoln can teach us about the state of our democracy today.
Scientists have found a way to turn the skin cell of a mouse into the equivalent of a stem cell, and they say someday this technique might be transferable to humans. The latest findings and what they mean for the national debate over embryonic stem cell research.
- Rick Weiss Science reporter for "The Washington Post"
- Dr. John Gearhart Director, Institute for Regenerative Medicine, at the University of Pennsylvania
- Dr. William Hurlbut Physician and consulting professor at the Neuroscience Institute at Stanford University Medical Center; member of the President's Council on Bioethics
- Dr. Marius Wernig Postdoctoral researcher at the Whitehead Institute for Biomedical Research, an independent research and educational institution that shares a teaching affiliation with MIT
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