As a physician, I recommend nutritious hemp seeds and oil to anyone interested in maintaining a healthy diet. Everyone will benefit when American farmers can grow this amazing crop once again.

Giving gifts to others is a fundamental activity, as old as humanity itself. Yet in the modern, complex world, the particulars of gift-giving can be extraordinarily challenging.

Each day as I travel through downtown Tucson, I am amazed at how quickly the most ancient of human behaviors have changed. For as long as there have been Homo sapiens - roughly 200,000 years - people have filled their lives principally with two activities: talking directly with other people, and doing physical things.

Citizens must pressure the American Hospital Association, the American Public Health Association, the Centers for Disease Control and other relevant governmental agencies to make greening our hospitals and medical centers a top priority so that they themselves don't create even more illness.

The bottom line is that the human body is complex and subtle, and oversimplifying - as common sense sometimes impels us to do - can be hazardous to your health.

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.

Human beings and plants have co-evolved for millions of years, so it makes perfect sense that our complex bodies would be adapted to absorb needed, beneficial compounds from complex plants and ignore the rest.