According to Stanford Professor Laura L. Carstensen, the 20th century bequeathed us a fabulous gift: an average of 30 more years of life! Life expectancy at birth is now 78, whereas in the early 1900s it was only about 50. Today there are more than 70,000 centenarians in the U.S., roughly four times the number there were just ten years ago. We need to think about those extra decades, and how we want to spend them (and how we plan to afford them).
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