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  2. Evolution of ageing - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_ageing

    Evolution is the change in a heritable trait in a population across generations since mutations generate variations in the heritable traits; they are considered the raw material for evolution. Therefore, beneficial mutation accumulations during the developmental processes could generate more phenotypic variations, which increases their gene ...

  3. Ageing - Wikipedia

    en.wikipedia.org/wiki/Ageing

    Ageing (or aging in American English) is the process of becoming older. The term refers mainly to humans , many other animals , and fungi, whereas for example, bacteria, perennial plants and some simple animals are potentially biologically immortal .

  4. Senescence - Wikipedia

    en.wikipedia.org/wiki/Senescence

    Senescence (/ s ɪ ˈ n ɛ s ə n s /) or biological aging is the gradual deterioration of functional characteristics in living organisms. Whole organism senescence involves an increase in death rates or a decrease in fecundity with increasing age, at least in the later part of an organism's life cycle.

  5. Intrinsic and extrinsic ageing - Wikipedia

    en.wikipedia.org/wiki/Intrinsic_and_extrinsic_ageing

    Such an ageing process may include qualitative and quantitative changes and includes diminished or defective synthesis of collagen and elastin in the dermis. [citation needed] Extrinsic ageing of skin is a distinctive declination process caused by external factors, which include ultra-violet radiation, cigarette smoking, air pollution, among ...

  6. Disposable soma theory of aging - Wikipedia

    en.wikipedia.org/.../Disposable_soma_theory_of_aging

    In biogerontology, the disposable soma theory of aging states that organisms age due to an evolutionary trade-off between growth, reproduction, and DNA repair maintenance. [1] Formulated by British biologist Thomas Kirkwood , the disposable soma theory explains that an organism only has a limited amount of resources that it can allocate to its ...

  7. Chinese fossil reveals evolution of skin in feathered dinosaurs

    www.aol.com/news/chinese-fossil-reveals...

    The Psittacosaurus fossil "strongly suggests that evolution of feathers - and the new skin adaptations - happened at the same time," McNamara said. The dinosaur's scaly skin closely resembled the ...

  8. Cellular senescence - Wikipedia

    en.wikipedia.org/wiki/Cellular_senescence

    [4] [5] [6] This process is known as "replicative senescence", or the Hayflick limit. Hayflick's discovery of mortal cells paved the path for the discovery and understanding of cellular aging molecular pathways. [7] Cellular senescence can be initiated by a wide variety of stress inducing factors.

  9. These 'Essential 8' habits slowed biological aging ...

    www.aol.com/news/8-ways-slow-biological-aging...

    Biological aging may be slowed significantly when people adopt the eight behaviors recommended by the heart association, dubbed “Life’s Essential 8,” the report from Columbia University ...