[James Smith] is venturing, of course, into one of the prevailing mysteries of aging, the persistent differences seen in the life spans of large groups. In every country, there is an average life span for the nation as a whole and there are average life spans for different subsets, based on race, geography, education and even churchgoing.
But the questions for researchers like Dr. Smith are why? And what really matters?
The answers, he ... Full Story »