Please Explain: Meditation

The practice of meditation has existed for some 2,500 years. David McKeel, Director of Practice & Education at Shambhala Meditation Center of New York, and Dr. Norman E. Rosenthal, clinical professor of psychiatry at Georgetown Medical School and author of Transcendence: Healing and Transformation through Transcendental Meditation, tell us what meditation is, how it works, and the research into its health benefits.