Are You Going to Live Into Your 90s?

We don't expect too many people at that time living into their 80s, 90s and getting a telegram from the Queen. It's partly simply body size, but it's partly that if you're very small and you're going to be eaten, then it pays you to live your life at a much faster rate. And also partly that you're losing a lot of heat through your skin and so on, and so you've got to have a very fast metabolic rate to replenish that. There's lots of conflicting reasons for it, but basically, if you are very small, you are more likely to die,. You have a faster metabolic rate, and that combination of circumstances means