On October 25, 2009, CBS Sunday Morning tackled the multifaceted issue of obesity. Here I examine some of the topics covered.   more »

Not a professional—I have enjoyed a long interest in biology. In the early nineties I was struck by the destructiveness of diseases related to an inappropriate immunological response. At that time I chose to read up on the subject and in a chapter on cancer found that I could not continue without resolving a question about what I had just read.    more »