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Nadia Comaneci
Nadia Comaneci became the first gymnast in Olympic history to score a perfect 10.0 when she competed on the uneven bars at the 1976 Montreal Olympics, at just 14 years old — a score so unexpected that the scoreboard, not built to display a perfect mark, showed "1.00" instead, and it took a moment for the crowd to realize what had actually happened. She went on to score six more perfect 10s at those same Games and won three gold medals at the 1976 Olympics alone, becoming an international star almost overnight and a defining figure in Romanian sports history during the Cold War era. Comaneci added two more Olympic golds at the 1980 Moscow Games, finishing her Olympic career with five gold medals total, and her technical precision and composure under pressure at such a young age reset expectations for what age and readiness looked like in elite gymnastics. Her perfect-10 breakthrough forced the International Gymnastics Federation to eventually redesign the sport's scoring system altogether, since a scale that couldn't meaningfully differentiate between multiple "perfect" routines had clearly become outdated — a rules change directly traceable to what she did on a single night in Montreal.
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Michael Phelps
Michael Phelps competed at five Olympic Games between 2004 and 2016 and finished with 28 total medals, 23 of them gold — both figures the most of any Olympian in any sport in the history of the Games, and by a margin so large that no other athlete's total is realistically within reach of either record. His most dominant single Games came in Beijing in 2008, where he won eight gold medals, breaking Mark Spitz's 1972 record of seven golds in a single Olympics. One of those eight, the 4x100m medley relay, came down to a margin of one-hundredth of a second, the closest possible finish in Olympic swimming. Phelps's core events were the butterfly and individual medley, disciplines that reward an unusually broad combination of strength, technique, and endurance across different strokes, and his 6-foot-7 wingspan paired with a comparatively short torso gave him a widely discussed physical advantage in the water that biomechanics researchers have studied extensively since. Phelps retired for good after the 2016 Rio Games and became an outspoken advocate for athlete mental health afterward, discussing his own struggles with depression following major competitions — a topic that's since become a more openly acknowledged part of elite athletes' post-Olympic experience.
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