From the Washington Post, the provocative Replaceable You:
As the tail end of the enormous 78 million-member baby boom generation enters middle age, Americans are living longer and expecting to enjoy better fitness and health than previous generations. The human body can't necessarily do at 50 what it did at 25, but when a part wears out from age or overuse or both, older Americans increasingly expect that it can be fixed or replaced.
Sign me up! ~