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Decay

/dɪˈkeɪ/noun / verb
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Decay is the gradual breakdown or deterioration of something, often through natural processes like decomposition or aging, leading to a loss of structure or value. In everyday contexts, it might describe rotting food or fading buildings, while in scientific fields, it refers to phenomena like radioactive decay that powers nuclear reactions and helps date ancient fossils.

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The radioactive decay of a single gram of radium releases energy equivalent to about 1 calorie per year, a discovery that led Marie Curie to win two Nobel Prizes and paved the way for modern nuclear medicine. This process not only powers smoke detectors but also helps treat cancer through targeted radiation therapy.

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