We are in the midst of incredible advances in genetic research that may permit us to identify the genetic causes of disease and identify who may be at risk for various diseases. In this program we visit the Genome Project at NIH and explore the status of genetic mapping. There are strong advocates of a nutritional approach to disease prevention. We visit Dr. Dean Ornish and examine his approach on the impact of diet and lifestyle on prevention and even reversal of heart disease. We also visit scientists at Berkley and explore the myths and the realities of environmental causes of disease. 30 Minutes