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What is the purpose of aging? Unpacking the complex science of why we grow old

According to a 2024 study by Stanford Medicine, the human body undergoes massive biomolecular shifts around age 40, with the number of certain molecules and microorganisms increasing before a dramatic decline after age 60. Unpacking this complexity is key to understanding the deeper biological question: what is the purpose of aging? The answer lies not in a single biological blueprint but in a multifaceted interplay of evolutionary compromises and cellular mechanics.