126 Fun Facts About Aging & Elderly

How many living centenarians did the United Nations estimate worldwide in 2020?

The United Nations estimated 573,000 living centenarians worldwide in 2020, almost four times its estimate of about 151,000 for the year 2000.

From what age is a person classed as a supercentenarian?

A supercentenarian is anyone aged 110 or over; only about one in a thousand centenarians reaches 110.

Which Frenchwoman is the oldest person whose age has ever been verified?

Jeanne Calment lived 122 years and 164 days, outliving both her daughter and her grandson.

Which pineal-gland hormone that regulates sleep declines markedly with age?

Melatonin, secreted by the pineal gland at night, sets the sleep-wake cycle; its output falls sharply in old age, one reason older adults sleep more lightly.

In which Provençal town was the world's oldest verified person born and did she spend her life?

Jeanne Calment was born in Arles in 1875 and died there in 1997; her father sat on the town council and her husband ran a drapery in the town.

Which painter did the oldest verified person claim to have met as a teenager in her uncle's shop?

Jeanne Calment said she met Vincent van Gogh in Arles in 1888, aged about 13, and recalled him as ugly, ungracious and reeking of alcohol.

At 90, the oldest verified person sold her apartment as a life estate; what happened to the buyer?

She remarked that in life one sometimes makes bad deals.

What did the oldest verified person do in January 1985, weeks before turning 110?

Jeanne Calment moved into the Maison du Lac nursing home in Arles in January 1985, having lived alone until then; her rap CD came in 1996.

What did the oldest verified person's husband reportedly die of in 1942?

Fernand Calment died in 1942, aged 73, reportedly of cherry poisoning after a dessert of preserved cherries; the couple were double second cousins.

A 2018 hypothesis claimed the oldest verified person was really her daughter; what was the daughter's name?

The 2018 hypothesis held that daughter Yvonne, officially dead in 1934, took over her mother Jeanne Calment's identity; mainstream gerontologists consider the theory weak.

Which Japanese man is the oldest man whose age has ever been verified?

Jiroemon Kimura of Kyoto Prefecture, who died in 2013, was the last surviving man born in the 19th century; Guinness recognised him as the oldest man ever in December 2012.

How old was the oldest verified man when he died in 2013?

Jiroemon Kimura died in June 2013 aged 116 years and 54 days, the only man ever verified to have reached 116.

For which employer did the oldest verified man work until he retired at 65?

Jiroemon Kimura worked for the post office from his teens until retiring at 65 in 1962, then helped farm until he was 90.

Which Japanese woman, who died in 2022 aged 119, is the second-oldest verified person ever?

Kane Tanaka of Fukuoka died in April 2022 aged 119; she was due to carry the Olympic torch in 2021 but withdrew because of COVID-19.

What business did the second-oldest verified person and her husband run in Fukuoka?

Kane Tanaka and her husband Hideo ran a shop selling udon noodles and zenzai sweet red-bean soup; in old age she took up Othello and calligraphy.

Which Pennsylvanian is the oldest verified American ever, dying in 1999 at 119?

Sarah Knauss of Allentown, Pennsylvania, died on 30 December 1999 aged 119; her daughter Kathryn Sullivan lived to 101.

How many living generations did the oldest verified American's family span shortly before her death?

Sarah Knauss's family spanned six living generations, from her daughter Kathryn Sullivan down to a great-great-great-grandchild, when she died in 1999.

In which US city was Maria Branyas, the world's oldest person until 2024, born?

Maria Branyas was born in San Francisco in 1907 to Catalan parents who returned to Spain in 1915; she died in Olot aged 117 in 2024.

Ethel Caterham, who became the world's oldest living person in 2025, is a subject of which country?

Ethel Caterham was born in Shipton Bellinger, Hampshire, in August 1909, making her a subject of the United Kingdom and the last surviving subject of King Edward VII, whose reign ended in 1910.

Until what age did Ethel Caterham keep driving?

Ethel Caterham kept driving until she was 97 and went on playing contract bridge well into her hundreds.

Which Dutchman was the first verified person to reach 110, in 1898?

Geert Adriaans Boomgaard, born in Groningen in 1788, turned 110 in September 1898; the verified record did not pass 115 until the 1980s.

As of 2024, roughly how many people in recorded history had indisputably reached 115?

By 2024 only about 80 people had been validated at 115 or older; just three of them, Jiroemon Kimura, Christian Mortensen and Emiliano Mercado del Toro, were men.

What is the term for someone aged 105 to 109?

A semisupercentenarian is someone aged 105 to 109; the full term 'supercentenarian', for 110-plus, has been in use since the 19th century.

Which organisation keeps the validated list of the world's oldest living people?

The Gerontology Research Group, founded in 1990, validates supercentenarian claims and keeps the reference list of the oldest living people; it estimates 300 to 450 living supercentenarians worldwide.

A study finding that many centenarian counts are inflated by pension fraud won which award in 2024?

Saul Justin Newman won the 2024 Ig Nobel Prize in Demography for showing that supposed longevity hotspots coincide with poor birth records and pension fraud rather than long lives.

What was the term 'blue zone' originally derived from?

Sardinia's Nuoro province was the first proposed zone.

Which Costa Rican region is one of the suggested blue zones?

The Nicoya Peninsula in Costa Rica's Guanacaste province was named a blue zone for its unusually long-lived men; later cohort studies found the advantage fading.

Which Greek island is counted among the suggested blue zones?

Icaria (Ikaria), in the eastern Aegean, was named a blue zone for its reportedly high share of residents reaching 90; the concept is widely challenged as unproven.

Who introduced the blue zones concept in 2005 and later formed a company around it?

Dan Buettner introduced blue zones in a 2005 National Geographic cover story; his company Blue Zones LLC was acquired by Adventist Health in 2020.

Which Californian city was added to blue zones marketing after editors asked for a US example?

Loma Linda, home to a large Seventh-day Adventist community, was added after a National Geographic editor asked Dan Buettner for an American example.

Roughly what share of the 150,000 people who die each day worldwide die from age-related causes?

About two-thirds of the roughly 150,000 people who die each day worldwide die of age-related causes; in industrialised nations the proportion reaches about 90%.

Normal human cells stop dividing after about how many divisions in culture?

The limit was discovered by Leonard Hayflick in 1961.

Whose claim that normal cells are immortal did the Hayflick limit refute?

Alexis Carrel, the Nobel-winning surgeon, claimed to have kept embryonic chicken heart cells dividing in culture from 1912 to 1946; Hayflick showed normal cells are mortal.

Where in Philadelphia did Leonard Hayflick make his 1961 discovery?

Leonard Hayflick and Paul Moorhead worked at Philadelphia's Wistar Institute, where they mixed old male and young female fibroblasts to show the division limit was real.

Who coined the name 'Hayflick limit' in a 1974 book on ageing?

Australian immunologist Macfarlane Burnet coined 'Hayflick limit' in his 1974 book Intrinsic Mutagenesis: A Genetic Approach to Ageing.

What are the protective repetitive DNA regions at the ends of chromosomes called?

Telomeres, from the Greek telos (end) and meros (part), are repetitive DNA caps that shorten with each cell division.

In which ciliate did Greider and Blackburn discover telomerase in 1984?

Carol Greider and Elizabeth Blackburn found telomerase in Tetrahymena thermophila on Christmas Day 1984, a discovery that earned them the 2009 Nobel Prize with Jack Szostak.

Which Soviet theorist first recognised in the early 1970s that chromosomes cannot fully copy their ends?

Alexey Olovnikov published his theory of marginotomy in 1971, predicting that chromosome ends shorten with each replication; James Watson noted the same end-replication problem in 1972.

Which gene is mutated in Hutchinson–Gilford progeria?

A point mutation in LMNA, the gene for lamin A, yields the truncated protein progerin, which deforms the cell nucleus and drives Hutchinson–Gilford progeria.

Children with classic progeria typically live to about what age?

Children with classic progeria typically live to their mid-teens to early twenties; death usually comes from heart attack or stroke caused by accelerated atherosclerosis.

Which condition is also known as 'adult progeria'?

Werner syndrome, or adult progeria, is named after Otto Werner, who described it in four siblings in his 1904 doctoral dissertation; it is caused by WRN gene mutations.

Who coined the word 'gerontology' in 1903?

Ilya Mechnikov, the Nobel-winning immunologist, coined 'gerontology' in 1903 from the Greek geron (old man) and -logia (study).

Gerontology studies ageing; what is the medical specialty that treats disease in older adults?

Geriatrics is the medical specialty treating disease in older adults; gerontology, by contrast, spans biologists, social scientists, architects and economists.

Which school created the first gerontology degree programmes in 1975?

The University of Southern California founded its Leonard Davis School of Gerontology in 1975, the first school of its kind; Leonard Davis was AARP's co-founder and insurance partner.

Which Mount Sinai physician proposed the term for old-age medicine in 1909?

Ignatz Leo Nascher, chief of clinic in Mount Sinai Hospital's outpatient department, coined 'geriatrics' in a 1909 article in the New York Medical Journal.

Who coined the term 'ageism' in 1969?

Robert Neil Butler coined 'ageism' in 1969 on the model of sexism and racism; his book Why Survive? Being Old in America won the 1976 Pulitzer Prize.

The man who coined 'ageism' became the first director of which US body?

Robert Butler became the first director of the National Institute on Aging in 1976 and made Alzheimer's research one of its priorities.

Which US federal programme, created in 1965, insures mainly people aged 65 and over?

Medicare, created by the 1965 Social Security Amendments, provides hospital and medical insurance for Americans 65 and over; Medicaid, created the same year, serves low-income people of any age.

At what age does the United Nations consider old age to begin?

A 2001 WHO report set it at 50 for Sub-Saharan Africa.

Which chancellor introduced the state old-age pension that later set 65 as the benchmark?

Otto von Bismarck's 1889 law first paid pensions at 70; Germany cut the age to 65 in 1916, and that figure became the benchmark for senior citizenship elsewhere.

What is the Japanese celebration of a 60th birthday, completing a full zodiac cycle, called?

Kanreki marks the 60th birthday, when the 60-year cycle of zodiac animals and elements returns to its start; the celebrant traditionally wears a red chanchanko vest.

Which caricaturist claimed his father invented the term 'senior citizen'?

Al Hirschfeld, the New York Times theatre caricaturist, claimed his father Isaac invented 'senior citizen'; the term apparently arose during a 1938 political campaign.

What did the UK's 1908 Old Age Pensions Act pay a single person over 70 each week?

The 1908 Act paid five shillings a week to a single person over 70 on a low income; couples got seven shillings and sixpence.

Which US president signed the Social Security Act in August 1935?

Franklin D. Roosevelt signed the Social Security Act on 14 August 1935, creating federal old-age benefits funded by payroll taxes.

How much was the first monthly US Social Security cheque, paid to Ida May Fuller in 1940?

Ida May Fuller of Vermont received the first monthly cheque, for $22.54, on 31 January 1940; she lived to 100 and drew benefits for 35 years.

For Americans born in 1960 or later, what is the full Social Security retirement age?

Full retirement age is 67 for Americans born in 1960 or later; the 1983 amendments raised it gradually from 65, starting with the 1938 birth cohort.

What does the acronym AARP originally stand for?

AARP began in 1958 as the American Association of Retired Persons; it adopted the bare initials as its name in 1999 to reflect members aged 50 and over, retired or not.

Which retired California educator founded AARP in 1958?

Ethel Percy Andrus, California's first female high-school principal, founded AARP in 1958 after starting the National Retired Teachers Association in 1947.

Where did AARP's founder find a retired teacher living in 1944, prompting her activism?

Ethel Percy Andrus found a retired teacher living in a chicken coop because her pension could not cover housing or healthcare; the discovery led her to found the NRTA in 1947.

At what age can a person take out a full AARP membership?

Its magazine and bulletin are the two largest-circulation publications in the US.

What was AARP's largest source of income in 2018?

Royalties brought in about $909 million against $301 million in dues.

Which US president signed the Older Americans Act in July 1965?

Lyndon B. Johnson signed the Older Americans Act on 14 July 1965 as part of the Great Society; it created the Administration on Aging.

On which date is the UN's International Day of Older Persons observed?

The International Day of Older Persons falls on 1 October; the UN General Assembly designated it in December 1990 and it was first observed in 1991.

On which date was Japan's Respect for the Aged Day held before it moved to a Monday in 2003?

Respect for the Aged Day fell on September 15 from 1966 until 2003, when it moved to the third Monday of September; it began as Old Folks' Day in a Hyōgo village in 1947.

What gift does the Japanese government give citizens who reach 100?

Japan gives new centenarians a silver sakazuki sake cup with a letter from the prime minister; as numbers soared the cups were later made silver-plated rather than solid silver to cut costs.

Which US president signed the 1978 proclamation creating National Grandparents Day?

Jimmy Carter signed the 1978 proclamation making the Sunday after Labor Day National Grandparents Day, after a campaign by West Virginia housewife Marian McQuade.

A French coffee brand launched Grandmothers' Day in 1987; what was it called?

It is now in French calendars on the first Sunday in March.

Which state exempts centenarians from state income tax?

New Mexico exempts residents aged 100 or over, provided nobody claims them as a dependant, from state income tax.

Who was the first sitting US senator to reach 100, in December 2002?

Strom Thurmond of South Carolina turned 100 on 5 December 2002, weeks before leaving the Senate; Jimmy Carter became the first ex-president to reach 100 in 2024.

Which Today show weatherman started the tradition of honouring centenarians on air in 1983?

Willard Scott began saluting centenarians on NBC's Today in 1983; Smucker's later sponsored the segment, which continued after Scott retired in 2015.

Which traditional Polish birthday song wishes the recipient a hundred years?

Sto lat ('a hundred years') is the traditional Polish song of good wishes for birthdays and name days, sung across the Polish diaspora.

In Judaism, to what age does the common blessing wish a person will live?

The blessing 'ad me'ah ve'esrim' wishes a life of 120 years, the age the Torah gives Moses at his death.

What do Irish centenarians receive along with a letter from the president?

At 101 they may get a silver coin quoting an Irish writer.

From which birthday onward does the British monarch send cards every year, after the 100th?

The monarch sends cards on the 100th and 105th birthdays and every year after the 105th; the Anniversaries Office at Buckingham Palace runs the scheme.

What is the sex ratio of centenarians in Japan, roughly?

In 2016 Japan counted 57,525 female and 8,167 male centenarians, about 7 women to every man; women make up nearly 88% of the total.

What was the estimated life expectancy at birth of humans in the early Bronze Age?

Estimates put early Bronze Age life expectancy at birth at about 24 years; high infant mortality drags the average down, and many who survived childhood lived far longer.

What was world life expectancy at birth in 2019?

Global life expectancy at birth reached 73.3 years in 2019 on WHO estimates; the COVID-19 pandemic then erased nearly a decade of gains, falling to 71.4 by 2021.

Who did the earliest documented work on life expectancy in the 1660s?

John Graunt analysed London's bills of mortality in 1662, and the brothers Christiaan and Lodewijck Huygens then computed expected remaining lifetimes from his tables in 1669.

Roughly what share of Japan's population was aged 65 or over in 2023?

About 29% of Japan's residents, some 36 million people, were 65 or over in 2023, the highest share of any large country.

By roughly how many years did average US lifespan rise during the 20th century?

US life expectancy rose from about 47 years in 1900 to nearly 77 in 2000, a gain of roughly 30 years, of which public-health advances account for about 25.

Twin studies suggest what share of variation in human lifespan is genetic?

Twin studies attribute only 20-30% of the variation in human lifespan to genes; more than 200 gene variants have been linked to longevity but explain little of it.

Which social factor did a 2010 meta-analysis rate as deadly as smoking 15 cigarettes a day?

Julianne Holt-Lunstad's 2010 meta-analysis of 148 studies found loneliness and weak social ties raised mortality risk about as much as smoking 15 cigarettes a day.

A 2025 Cell study of proteomic clocks found ageing accelerates sharply around what age?

The aorta showed the biggest protein changes; the adrenal gland starts ageing around 30.

Which short-lived worm is the model organism in which most lifespan-extending mutations were found?

Caenorhabditis elegans (C. elegans), a 1 mm nematode living two to three weeks, yielded the age-1 and daf-2 mutations that can double its lifespan.

Roughly what fraction of people over 85 have dementia?

Dementia affects about 3% of people aged 65–74, 19% of those 75–84 and nearly half of those over 85; semantic memory and vocabulary generally hold up even as other memory declines.

Alzheimer's disease accounts for roughly what share of dementia cases?

Alzheimer's disease causes 60-70% of dementia cases worldwide; difficulty remembering recent events is usually its first symptom.

What did Alois Alzheimer call the 51-year-old patient he first examined in 1901?

Auguste Deter, recorded as 'Auguste D.', was 51 when Alzheimer examined her in Frankfurt in November 1901; he followed her case until her death in April 1906.

A bone-density T-score at or below what value defines osteoporosis?

Osteoporosis is defined by a bone mineral density T-score of −2.5 or lower, 2.5 standard deviations below the young-adult mean; scores between −1 and −2.5 are osteopenia.

What is the age-related loss of ability to focus on close objects called?

Presbyopia, from the Greek for 'old eye', sets in from the mid-40s as the lens stiffens; sufferers joke that their arms have grown too short.

What is the age-related loss of skeletal muscle mass and strength called?

Sarcopenia, from the Greek for 'flesh loss', is the age-related decline in skeletal muscle mass and strength; adults can lose 3–8% of muscle mass per decade after 30.

By age 80, more than half of Americans have had or have what eye condition?

A cataract is a clouding of the eye's lens; by 80 more than half of Americans have had one or had it removed, one of the country's most common operations.

Grey hair is not caused by a grey colourant; what actually causes it?

The hairs look grey or white because of how light reflects off them.

What is the medical term for greying of the hair?

Canities, from the Latin canus ('grey, hoary'), is the medical term for greying of the hair; it is also called achromotrichia.

Every year, about what fraction of people aged 65-plus have a fall?

About a third of people aged 65 and over fall each year; falls are the leading cause of injury, and of injury-related death, among older adults.

By about how much does the average person shrink in height by age 80?

Height falls by about half an inch per decade after 40, so roughly two inches by 80, as spinal discs dry out, vertebrae compress and posture stoops.

Taste buds diminish by up to how much by age 80?

The number of working taste buds can fall by up to half by age 80, blunting taste and one reason nutrition can suffer in old age.

Which US state had the highest median age in the 2020 census?

Maine's median age of 44.8 in the 2020 census was the oldest of any state; Florida, for all its retirees, was about 42.

At what claimed age did Fauja Singh finish the 2011 Toronto Waterfront Marathon?

Fauja Singh, the 'Turbaned Tornado', finished the 2011 Toronto Waterfront Marathon at a claimed age of 100, the first centenarian to complete a marathon; Guinness withheld the record for lack of a birth certificate.

Menopause typically occurs between which ages?

45 and 55 bracket the typical age, although the exact timing varies and smoking can bring it on earlier.

Which retirement community did AARP's founder start in Ojai, California, in 1954?

Ethel Percy Andrus opened Grey Gables in Ojai in 1954 as a retirement residence for teachers, one of the first modern retirement homes, run by her National Retired Teachers Association.

Which nickname is given to people over 80 who keep the cognitive performance of someone much younger?

'Superagers' are people over 80 with the memory of someone decades younger; neurologist Marsel Mesulam coined the term at Northwestern University.

Which jellyfish is called 'immortal' because it can revert to its polyp stage?

Turritopsis dohrnii, the 'immortal jellyfish', can turn its adult medusa back into a polyp through transdifferentiation, in theory indefinitely.

How old was Ming the clam, dredged off Iceland in 2006, when finally re-dated in 2013?

Ming, an ocean quahog, was first put at 405–410 years old; re-counting its shell growth lines in 2013 gave 507 years, making it the oldest known non-colonial animal.

Which tortoise on St Helena, hatched around 1832, became the oldest known living land animal?

Jonathan, a Seychelles giant tortoise on St Helena, was hatched around 1832 and passed 190 in 2022, the oldest known living land animal; Adwaita and Tu'i Malila were earlier long-lived tortoises.

Which Arctic species has the longest known lifespan of any vertebrate, up to about 500 years?

Radiocarbon dating of eye-lens nuclei in 2016 put Greenland sharks at up to about 400 years, possibly 500, the longest of any vertebrate; they mature at around 150.

Which Arctic mammal may be the longest-lived of all, reaching more than 200 years?

Bowhead whales can live beyond 200 years; one caught off Alaska in 2007 carried a bomb-lance fragment patented in 1879, and amino-acid dating has put some at about 211.

Which rodent can live beyond 37 years, longer than any other?

The naked mole-rat has lived past 37 years in captivity, far beyond any other rodent; its mortality rate does not rise with age and it is highly cancer-resistant.

What kind of tree is Methuselah, the oldest known non-clonal tree at about 4,858 years?

Methuselah is a Great Basin bristlecone pine in California's White Mountains, germinated around 2833 BC; its exact location was long kept secret to protect it.

According to Genesis, to what age did the biblical patriarch Methuselah live?

Genesis 5:27 gives Methuselah 969 years, the longest lifespan in the Bible; he was Noah's grandfather.

The immunosuppressant rapamycin, studied for its anti-ageing effects, is named after which place?

Rapamycin takes its name from Rapa Nui, Easter Island, where the soil bacterium Streptomyces hygroscopicus that produces it was collected; Suren Sehgal isolated it in 1972.

Which dietary intervention did Clive McCay first show to extend rats' lifespan in 1935?

Caloric restriction, cutting calories without malnutrition, extended rat lifespan in Clive McCay's 1935 Cornell experiments and has since done so in yeast, worms, flies and mice.

How old was the second-oldest verified person's husband when he died after 71 years of marriage?

Hideo Tanaka, whom Kane married in 1922, died in 1993 aged 90; he had been drafted into the army from 1937 to 1939.

Which figure of Greek history first mentions the legendary fountain of youth?

Herodotus, in Book III of his Histories, told of an Ethiopian spring whose water gave its drinkers long life, the earliest surviving fountain-of-youth story.

Which Norwegian, who died in 1785, was the first validated person to reach 100?

Eilif Philipsen, born in Kinsarvik, Norway, in July 1682, reached 100 in July 1782 and died in 1785, the first person whose centenarian claim was validated.

In which year did people aged 65 and over first outnumber children under five worldwide?

The UN's 2019 World Population Prospects reported that in 2018, for the first time in history, people aged 65 and over outnumbered children under five worldwide.

Roughly what share of US private-industry workers had access to a defined-benefit pension in 2023?

About 15% of private-industry workers had access to a traditional defined-benefit pension in 2023; most employers offer 401(k)-style defined-contribution plans instead.

After how many years of active duty can members of the US Armed Forces elect to retire?

US service members can elect to retire after 20 years of active service, historically at 50% of base pay, rising 2.5 percentage points per additional year.

How many people were estimated to have Alzheimer's disease worldwide as of 2020?

About 50 million people worldwide had Alzheimer's disease in 2020; Alzheimer's and other dementias ranked as the seventh leading cause of death in 2019.

George Washington's presidential dentures were carved from what?

Washington's dentures were carved mainly from hippopotamus and elephant ivory, fitted with human and cow teeth and metal springs; none were wooden, despite the legend.

Which ancient Italian people made partial dentures from human or animal teeth bound with gold bands?

The Etruscans of central Italy made partial dentures from human or animal teeth held by gold bands as early as the 7th century BC.

Which folk artist began painting in earnest at 78 and made the cover of Time in 1953?

Grandma Moses, Anna Mary Robertson Moses, had embroidered pictures in yarn until arthritis made her switch to paint; she lived to 101.

Who became the oldest Nobel laureate ever at 97, sharing the 2019 Chemistry prize for lithium-ion battery work?

John B. Goodenough shared the prize with M. Stanley Whittingham and Akira Yoshino for lithium-ion battery cathodes, and kept working at the University of Texas until his death at 100.

Which Canadian actor became the oldest Oscar acting winner at 82, for Beginners?

Christopher Plummer held the record until 83-year-old Anthony Hopkins won in 2021, and was nominated again at 88 for All the Money in the World.

Which scientist first proposed the free radical theory of aging in the 1950s?

In the 1970s Harman extended the idea to blame reactive oxygen species produced by mitochondria.

The original blue zone survey found longevity concentrated in the mountains of which Sardinian province?

Pes and Poulain's survey found the highest male centenarian rates in the mountain villages of Nuoro province in central-eastern Sardinia; the list of zones grew from 2005 to include Okinawa, Nicoya and Icaria.

Which class of experimental drugs, many repurposed anti-cancer molecules, aims to selectively kill senescent cells?

Senolytics take their name from senescence and -lytic, 'breakdown'; candidates such as dasatinib and navitoclax are repurposed anti-cancer molecules, while a 'senostatic' merely suppresses senescence.