At Vassar College, in the 1980s, the argument was usually framed with a thought-experiment: Imagine that you wake up in a hospital bed, hooked up to a machine and soon realize that if you disconnect yourself from the machine, the person in the next bed will die.

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And last month, she received a patent for her Time Machine, an LED light bed, which she invented to help reverse signs of aging on the entire body.

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The day after a knee replacement, most orthopedic surgeons have their patients use a continuous passive-motion machine, which flexes and extends the knee as they lie in bed.

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It is a modest home with a raised bed, a television, a few utensils, a shiny red refrigerator and a washing machine tucked away behind a curtain.

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