Our feet are our body's connection to the earth.

The most common objection that I hear to walking as exercise is that it's too easy, that only sweaty, strenuous activity offers real benefits. But there is abundant evidence that regular, brisk walking is associated with better health, including lower blood pressure, better moods and improved cholesterol ratios.

It's rare - too rare, I have to say - for botanists to become doctors.

Millions of Americans today are taking dietary supplements, practicing yoga and integrating other natural therapies into their lives. These are all preventive measures that will keep them out of the doctor's office and drive down the costs of treating serious problems like heart disease and diabetes.

Meditation while walking has a long, noble history in ancient spiritual disciplines.

Dietary fat, whether saturated or not, is not a cause of obesity, heart disease or any other chronic disease of civilization.

You've got to experiment to figure out what works.