Ageing

Immortality is eternal life, the ability to live forever.

Progeria is an extremely rare genetic disorder in which symptoms resembling aspects of aging are manifested at a very early age.

The birth rate (technically, births/population rate) is the total number of live births per 1,000 of a population in a year.

Population decline can refer to the decline in population of any organism, but this article refers to population decline in humans.

Ageing population is a phenomenon that occurs when the median age of a country or region increases due to rising life expectancy and/or declining fertility rates.

A population pyramid, also called an age pyramid or age picture is a graphical illustration that shows the distribution of various age groups in a population (typically that of a country or region of the world), which forms the shape of a pyramid when the population is growing.

Varicose veins are veins that have become enlarged and twisted.

Biological immortality refers to a stable or decreasing rate of mortality from senescence, thus decoupling it from chronological age.

Intergenerational equity in economic, psychological, and sociological contexts, is the concept or idea of fairness or justice in relationships between children, youth, adults and seniors, particularly in terms of treatment and interactions.

Senescence-associated beta-galactosidase (SA-β-gal or SABG) is a hypothetical hydrolase enzyme that catalyzes the hydrolysis of β-galactosides into monosaccharides only in senescent cells.

Knowledge of fish age characteristics is necessary for stock assessments, and to develop management or conservation plans.

Horse teeth refers to the dentition of equine species, including horses and donkeys.

Stereotype embodiment theory (SET) is a theoretical model first posited by psychologist Becca Levy to explain the process by which age stereotypes influence the health of older adults.

Reminiscence therapy is defined by the American Psychological Association (APA) as "the use of life histories – written, oral, or both – to improve psychological well-being.

Progeroid syndromes (PS) are a group of rare genetic disorders that mimic physiological aging, making affected individuals appear to be older than they are.

The Aging Research Centre (ARC) in Karolinska Institutet was established in the year 2000, is a multidisciplinary center in which both the medical university Karolinska Institutet (KI) and Stockholm University (SU) are collaborating.

Muscle atrophy is defined as a decrease in the mass of the muscle; it can be a partial or complete wasting away of muscle, and is most commonly experienced when persons suffer temporary disabling circumstances such as being restricted in movement and/or confined to bed as when hospitalized.

A group home is a private residence for children or young people who cannot live with their families, people with chronic disabilities who may be adults or seniors, or people with dementia.

Aging Artfully: 12 Profiles of Visual and Performing Artists Aged 85-105 is a 2006 book by Berkeley author Amy Gorman.