The average life span for Americans hovered around 40 years for the first 100 years of the nation's existence. But after 1880, breakthroughs in modern medicine and public health resulted in a dramatic rise in life expect
Q&A: Unforeseen consequences of the 'great aging' of America
The average life span for Americans hovered around 40 years for the first 100 years of the nation's existence. But after 1880, breakthroughs in modern medicine and public health re
