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Ageing (or aging in American English) is the process of becoming older until death. 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 .
Population ageing is a shift in the distribution of a country's population towards older ages and is usually reflected in an increase in the population's mean and median ages, a decline in the proportion of the population composed of children, and a rise in the proportion of the population composed of the elderly.
Older people have different requirements from society and government, and frequently have differing values as well, such as for property and pension rights. [1] Older people are also more likely to vote, and in many countries the young are forbidden from voting. Thus, the aged have comparatively more, or at least different, political influence. [2]
Between 1966 and 2023, the number of people qualified for Medicare tripled to nearly 65 million, with 10 million seniors and disabled people being added to the system from 2013 to 2023. [ 161 ] In the early 2020s, among Americans aged 65 or older, 14% of all expenditures goes to healthcare, compared to 8% for the general population. [ 55 ]
Old age is the range of ages for people nearing and surpassing life expectancy. People who are of old age are also referred to as: old people, elderly, elders, senior citizens, seniors or older adults. [1] Old age is not a definite biological stage: the chronological age denoted as "old age" varies culturally and historically. [2]
This is a list of the oldest living people who have been verified to be alive as of the dates of the cited supporting sources. It was estimated in 2015 that between 150 and 600 living people had reached the age of 110. [1]
An old man at a nursing home in Norway. Elderly care, or simply eldercare (also known in parts of the English-speaking world as aged care), serves the needs of old adults.It encompasses assisted living, adult daycare, long-term care, nursing homes (often called residential care), hospice care, and home care.
350 BCE — The Greek philosopher Aristotle, arguably the first philosopher to make a serious attempt to scientifically explain aging, proposes his thesis on aging.He suggests that aging is a process by which human and animal bodies, which are naturally hot and wet, gradually become dry and cold, and theorizes that more moisture delays aging.