By keeping my hand in that, it's the way I keep learning. The main way you learn in medicine is by practicing and working with patients.

To be clear, I worry as much about the impact of the Internet as anyone else. I worry about shortening attention spans, the physical cost of sedentary 'surfing' and the potential for coarsening discourse as millions of web pages compete for attention by appealing to our base instincts.

Gardening is not trivial. If you believe that it is, closely examine why you feel that way. You may discover that this attitude has been forced upon you by mass media and the crass culture it creates and maintains. The fact is, gardening is just the opposite - it is, or should be, a central, basic expression of human life.

In the world at large, people are rewarded or punished in ways that are often utterly random. In the garden, cause and effect, labor and reward, are re-coupled. Gardening makes sense in a senseless world. By extension, then, the more gardens in the world, the more justice, the more sense is created.

I grew up in the military. I've lived that life. I know that our soldiers are out there fighting for our right to vote, and they're out there fighting for other countries' rights to vote... Guys have been dying for it, and we have to go out and exercise it.

We know a great deal more about the causes of physical disease than we do about the causes of physical health.

I'm doing four hours of gymnastics training a day, six days a week and then an extra two to three hours in a fitness center as well.

People need to exercise and pay more attention to their health.