A closer look at human physiology will show that our bodies adapt. This life expectancy is a bit of a red herring. Children often died through accidents or poor living conditions. Childbirth was not as safe as it might be, every young death brought down the averege considerably. But you raise a good point and well worth a debate. That our food chain is full of stuff that shouldn't be there. If our bodies have the tools, the bad entities can often be dealt with in real time. Unfortunately eating crap food is not nourishing the body, and does not replenish the nutrients required. The body does not get the necessary vitamins and minerals it needs. So instead of dealing with the undesirables as they come in, they are tucked away in the tissues, where they can rear their heads later, and cause havoc.
