Here's an article in New Scientist about how obesity may be a defense mechanism to protect against a bad diet. It would explain how some heavy people don't become ill and some thin ones do. Ok, now switching back to your regularly scheduled program. And yes, we are geeks who read science magazines and last night I spent the drive home moving from Martin Luther to communism by some weird conversational quirks. With my 16 and 14 yo sons. Weird stuff.