Gerontology, the study of aging, is a relatively new science that has made incredible progress over the last 30 years. In the past, scientists looked for a single theory that explained aging, but have realized that aging is a complex interaction of genetics, chemistry, physiology, and behavior. There are now dozens of theories of aging to explain this inevitable fact of being human.
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Read more here: https://www.verywellhealth.com/why-we-age-theories-and-effects-of-aging-2223922
