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  2. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    Time dilation is the difference in elapsed time as measured by two clocks, either because of a relative velocity between them (special relativity), or a difference in gravitational potential between their locations (general relativity). When unspecified, "time dilation" usually refers to the effect due to velocity.

  3. Intrinsic and extrinsic ageing - Wikipedia

    en.wikipedia.org/wiki/Intrinsic_and_extrinsic_ageing

    Intrinsic ageing and extrinsic ageing are terms used to describe cutaneous ageing of the skin and other parts of the integumentary system, which while having epidermal concomitants, seems to primarily involve the dermis. [1] Intrinsic ageing is influenced by internal physiological factors alone, and extrinsic ageing by many external factors.

  4. Photoaging - Wikipedia

    en.wikipedia.org/wiki/Photoaging

    Dyspigmentation, the formation of wrinkles and other symptoms appear around regions of skin commonly exposed to sun, mostly the eyes, mouth and forehead. [10] The lips may be affected. [10] In Canadian women, the upper chest is commonly affected. [10] Spider veins on face and neck; Loss of color and fullness in lips

  5. Here's why astronauts age slower than the rest of us here on ...

    www.aol.com/news/heres-why-astronauts-age-slower...

    But time is weird, and there's another phenomenon called relative velocity time dilation that usurps gravity's effect. Why astronauts age slower Relative velocity time dilation is where time moves ...

  6. Collagen loss - Wikipedia

    en.wikipedia.org/wiki/Collagen_loss

    Aging skin is characterized by wrinkles, loss of skin flexibility, laxity, and having a rough appearance in the skin texture. Prevalent throughout the body, loss of collagen can also contribute to numerous other disorders such as joint pain , weakened hair and nails , reduced bone density , gastrointestinal issues , and reduced muscle mass .

  7. The best skin care routine for your 60s, according to ... - AOL

    www.aol.com/lifestyle/best-skin-care-routine-for...

    The formula contains hydrating oils to calm aging, overly sensitive skin exposed to retinol, while the sun protection ingredients shield your skin from UV radiation damage. $41 at Sephora Explore ...

  8. Gravitational time dilation - Wikipedia

    en.wikipedia.org/wiki/Gravitational_time_dilation

    Gravitational time dilation is a form of time dilation, an actual difference of elapsed time between two events, as measured by observers situated at varying distances from a gravitating mass. The lower the gravitational potential (the closer the clock is to the source of gravitation), the slower time passes, speeding up as the gravitational ...

  9. Time perception - Wikipedia

    en.wikipedia.org/wiki/Time_perception

    The Kappa effect or perceptual time dilation [55] is a form of temporal illusion verifiable by experiment. [56] The temporal duration between a sequence of consecutive stimuli is thought to be relatively longer or shorter than its actual elapsed time, due to the spatial/auditory/tactile separation between each consecutive stimuli.