We have all had our hearts broken or know someone that has. But are there actual medical and physiological effects of having a "broken heart" or is it just a figure of speech? Watch as Emory Professor of Epidemiology, Viola Vaccarino, discuss the real science behind a "broken heart."

For a full year, AJ Jacobs followed every piece of health advice he could -- from applying sunscreen by the shotglass to wearing a bicycle helmet while shopping. Onstage at TEDMED, he shares the surprising things he learned.

Andrew Hessel, a consulting biologist and advocate of DNA technologies, discusses the acceleration of technological DNA change to help cure cancer. Hessel refers back to 2002 when he booted up the first synthetic virus and started to make synthetic bacteria. Today he is playing around and reengineering simple organisms like algae to make fuels. Hessel emphasized that the field is moving so quickly that education has not been able to keep up. There aren't that many genetic engineers because the only way you can learn the skill is by doing it.

An award-winning neuroscientist with a deep appreciation for the rewards and benefits of teaching, Wendy Suzuki discusses her research, and the teachers who inspired her.

Wendy Suzuki holds a faculty position in the Center for Neural Science at New York University, where she also runs an active research lab. Her research focuses on understanding the patterns of brain activity underlying long-term memory as well as the role of aerobic exercise in improving learning, memory and cognition.

Dr. Howard Rankin B.A., M.Phil., Ph.D, has published over thirty-five scientific papers on addictions and eating disorders and for ten years was the associate editor of the scientific journal Addictive Behaviors. At the Institute of Psychiatry, University of London, he conducted groundbreaking research on the subject of temptation and self-control and was part of the team that redefined the scientific concept of dependence. Dr. Rankin has authored or co-authored 10 books on communication, relationships, wellness and weight loss, including the best selling Inspired to Lose .Dr.

Dr. David Katz MD, MPH, FACPM, FACP is an internationally renowned authority on nutrition, weight management, and the prevention of chronic disease, and an internationally recognized leader in integrative medicine and patient-centered care. He is a board certified specialist in both Internal Medicine, and Preventive Medicine/Public Health, and Associate Professor (adjunct) in Public Health Practice at the Yale University School of Medicine.

Tanzeem Choudhury, a computer scientist, and Ethan Berke, a physician, team up to create BeWell, a mobile technology that monitors well-being by using voice pattern recognition technology. Choudhury's research investigates micro-level voice patterns which Berke uses to detect subtle changes in wellness.

When Dave deBronkart learned he had a rare and terminal cancer, he turned to a group of fellow patients online -- and found a medical treatment that even his own doctors didn't know. It saved his life. Now he calls on all patients to talk with one another, know their own health data, and make health care better one e-Patient at a time.

Change your Brain, Change your Life. Revelations based on studying 63,000 brain images across 90 countries over 20 years. How Brain imaging can change paradigms and our understanding of healthy life, no matter where we live.

Physician, psychiatrist, and teacher, Daniel Amen, MD, is one of the world's foremost experts on applying brain imaging science to clinical psychiatric practice. He is widely regarded as a gifted teacher, taking complex brain science concepts to make them easily accessible to other professionals and the general public.