In 1900, the average life expectancy in the developed world was to age 47. Since then, advances in health care and quality of life have added another 30 years to the average American's life...at a rate of two years per decade.With such a drastic improvement in expected lifespan, some are asking how far can we push the boundaries of longevity. Pulitzer Prize winning science writer Jonathan Weiner takes a look at the scientists and researchers that are looking to prolong the human lifespan.... by 25 years, 50 years and beyond.
LISTEN: JONATHAN WEINER - LONG FOR THIS WORLD
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