Coral reefs are crucial to the ocean's ecosystem, providing sustenance to a quarter of marine life. Today, more than one third of the world's reefs are deteriorating. What's causing coral reef destruction and possible new remedies to address it.
Scientists in South Korea have announced they have successfully cloned human embryos for disease research. We’ll discuss this latest advance and the debate in this country over the ethics of therapeutic cloning.
- Alfonso Gomez-Lobo Professor of Metaphysics and Moral Philosophy, Georgetown University
- Dr. John Gearhart Director, Institute for Regenerative Medicine, at the University of Pennsylvania
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