Dr. Alain Carpentier

AGE: 75
OCCUPATION: Heart surgeon
PREVIOUS APPEARANCES ON THE TIME 100: 0

PRO: Using technology originally intended for airplanes, the French cardiac whiz has developed a remarkably lifelike artificial heart. Although it has thus far only been tested on animals, the device could alleviate the need for heart transplants.

CON: It will be at least another two years before it's ready to test in humans.

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