Wikidata

User:Emijrp/All Human Knowledge

< User:Emijrp
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Preserving all human knowledge for posterity. It is all-important.
Wikimedia servers, holding terabytes of text and images.[2]
This page, a catalogue of catalogues of all human knowledge, is only 119,098 bytes in size. It can be stored on a 5¼-inch floppy disk.
The Voyager Golden Record are vinyl records (listen in YouTube) which were included aboard both Voyager spacecraft launched in 1977. They contain sounds and images selected to portray the diversity of life and culture on Earth, and are intended for any intelligent extraterrestrial life form, or for future humans, who may find them.
Imagine a universe in which every planet shares in the sum of all knowledge.
Knowledge as a social good and the Library of Babel in Wikimanía 2009. (Watch in YouTube)

The idea of compiling all human knowledge in a single work, though not in a single place,[3] is highly seductive. In this essay, we attempt to study how many articles are needed to cover the sum of all human knowledge. As of April 2024, English Wikipedia has 6,815,512 articles[4] and Wikidata includes 109,406,002 items.[5] But both projects are far from being complete.

Of course, there are already articles for all the countries in the world and most of their administrative divisions, millions of biographies, hundreds of thousands of geographical features, tens of thousands of creative works like books and movies, but examining these topics and others with an exhaustive focus still shows millions of missing articles.

"This is a work that cannot be completed except by a society of men of letters and skilled workmen, each working separately on his own part, but all bound together solely by their zeal for the best interests of the human race and a feeling of mutual good will." –Denis Diderot, Encyclopédie (1751–1766)

Wikipedia, Wikidata and their sister projects like Wikimedia Commons have different standards of notability. There have been hot debates about notability, specially in Wikipedia, and despite notability threshold has decreased along the years, it is still stronger in Wikipedia than in Wikidata.

In this essay, it is assumed that any topic covered in a reputable source deserves a place in the Wikimedia projects, regardless of whether it is a prominent ancient Greek philosopher or an apparently irrelevant star in a distant galaxy million light-years away. This page, still in expansion, estimates the potential number of items for Wikidata on 2,434,602,742.

You are welcome to improve this page, be bold!

Background edit

Many individuals devoted their lifes to different efforts of knowledge compilation and preservation. Some inspiring cases are Vivian Maier, a nanny that took 150,000 photographs during her lifetime primarily of people and architecture;[6] Paul Mawhinney, who archived a copy of every sold album growing a 3 million vinyl collection;[7] Henry Spencer, a computer scientist that preserved over 2 million Usenet messages onto magnetic tapes[8] or Marion Stokes, who recorded hundreds of thousands of hours of television news footage spanning 35 years.[9]

"Like all persons of the Library, I have traveled in my youth; I have wandered in search of a book, perhaps the catalogue of catalogues..." –Jorge Luis Borges, The Library of Babel (1941)

Before Wikipedia, there were many attemps to compile all human knowledge in a single work. Some examples sorted by date include:

Also, hypothetical cases exist: Encyclopedia Galactica (1980) by Carl Sagan in Cosmos, Permanent World Encyclopaedia (1936–1938) by H. G. Wells and Memex (1945) by Vannevar Bush. Finally, there are imaginary examples too: "The Universal Library" (1901) by Kurd Lasswitz, "The Total Library" essay and The Library of Babel (1941) by Jorge Luis Borges, Encyclopedia Galactica (1942) in Foundation series by Isaac Asimov and the Akashic records.

Furthermore, there are thousands of archive, library and museum all over the world preserving human knowledge in several formats: book, manuscript, academic journal, newspaper, magazine, sound and music recording, video recording, play-scripts, patent, database, map, postage stamp, print, drawing and more. Some of the largest ones are: British Library (170 million items[10]), Library of Congress (155 million items[11]), Russian State Library (43 million items[12]), National Diet Library (35 million items[13]), National Library of China (31 million items[14]) and Bibliothèque nationale de France (31 million items[15]).

"There is no practical obstacle whatever now to the creation of an efficient index to all human knowledge, ideas and achievements, to the creation, that is, of a complete planetary memory for all mankind." –H. G. Wells, World Brain (1937)

For completeness of sister projects, see § Sister projects. For an estimate about lost knowledge, see § Destroyed knowledge and Wikipedia:There is a deadline.

Summary edit

Topic Subtopic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5]
Arts
Architecture
340,073
1,036,078
5,632,290
11,416,533
 Aquaria · Aqueducts · Bridges · Bullrings · Castles · Cemeteries · Dams · Fountains · Gates · Monuments · Horse racing venues · Hospitals · Hotels · Houses · Lighthouses · Military bases · Mines · Movie theaters · Observatories · Palaces · Parks · Places of worship · Power stations · Prisons · Research stations · Reservoirs · Schools · Shopping centers · Skyscrapers · Squares · Stadiums · Streets · Theatres · Towers · Tunnels · Universities · Watermills · Weather stations · Windmills · Zoos
Cinema, television and radio
293,526
21,935
788,279
9,031,405
 Movies · TV episodes · TV stations · TV channels · TV programs · Radio stations · TV awards
Literature
107,094
27,326
44,043,680
251,814,933
 Academic journals · Journal articles · Thesis · Bibliographies · Comics · Dictionaries · Dictionary entries · Encyclopedias · Encyclopedia articles · Books · Editions · Codices · Incunabulas · Manuscripts · Speeches · Fictional entities · Magazines · Newspapers · Poetry · Theatre · Literature awards
Performing arts
162,960
2,262
344,007
98,019,876
 Musical instruments · Albums · Songs
Visual arts
23,822
140,777
1,825,689
10,869,528
 Drawing · Painting · Photography · Sculptures
Geography
Human geography
300,218
125,968
1,504,918
1,504,918
 Sovereign states · Administrative divisions · Micronations
Physical geography
117,539
80,144
2,073,932
3,186,985
 Continents · Canals · Caves · Deserts · Oases · Forests · Glaciers · Hills · Islands · Lakes · Mountains · Mountain ranges · Rivers · Seas · Volcanoes
History History
519,384
99,353
1,663,806
1,813,382
 Calendar days · Events · Disasters · Elections · Time of day
GLAM GLAM
47,892
51,540
969,524
919,702
 Archives · Libraries · Museums · Collections
Science
Astronomy
39,070
7,441
7,613,184
1,814,837,862
 Galaxies · Stars · Black holes · Pulsars · Supernovae · Exoplanets · Natural satellites · Asteroids · Comets · Radio source
Biology
476,177
251,413
6,020,052
10,846,554
 Domains · Kingdoms · Phyla · Classes · Orders · Families · Genera · Species · Cell lines · Genes · Proteins · Non-coding RNA
Chemistry and physics
0
0
1,146,000
60,000,000
 Chemical compounds
Health
6,368
2,079
415,688
424,962
 Clinical trials · Diseases · Drugs
Mathematics
2,478
15,069
424,284
624,091
 Numbers · Prime numbers · Integer sequences
Research
1,183
297
473,085
473,085
 Research projects
Society Society
212,077
289,932
16,931,883
113,727,469
 Biographies · Given name · Family names · Business · Crafts · Organizations · Positions
Technology
Inventions
4
12
240,659
240,659
 Patents
Software
33,059
2,902
115,171
115,171
 Applications
Transport
30,016
45,217
121,203
36,118,087
 Roads
Special pages Special pages
1,000,867
48,707
8,617,540
8,617,540
 Categories · Disambiguations · Lists · Portals · Templates
Total
3,713,807
2,248,452
100,964,874
2,434,602,742

Arts edit

The arts are composed of many endeavors (or artforms) united by their employment of the creative impulse. (Main articles: outline of the visual arts, element of art and Principles of art)

Architecture edit

architecture is both the process and product of planning, designing and construction. Architectural works, in the material form of buildings, are often perceived as cultural and political symbols and as works of art. Historical civilizations are often identified with their surviving architectural achievements. (Main articles: outline of architecture and lists of buildings and structures) (Main categories: Category:Architecture lists and Category:Lists of buildings and structures) (For libraries, museums, archives, see #GLAM) (For transport infrastructure, see #Transport) (Note: some of these items may overlap)

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
public aquarium (Q2281788): facility with large tanks for water-dwelling species
200
 According to Vancouver Aquarium there are 200+ aquaria worldwide.[16]
 
aqueduct (Q474): structure constructed to convey water
1,408
 Total number of aqueducts is unknown.
 
bridge (Q12280): structure that spans and provides a passage over a road, railway, river, or some other obstacle
5,000,000
 Total number of bridges is unknown. There are at least 614,000 bridges in the United States,[17], 39,500 bridges on federal roads in Germany[18] and 17,500 road bridges in the Czechia alone[19]. That gives roughly estimate of 500—2,000 inhabitants per bridge, so the total number would be between 5 and 15 millions worldwide.
 
bullring (Q1193438): arena where bullfighting is performed
3,500
 According to sources, there are 3,500+ bullrings.[20]
 
castle (Q23413): type of fortified structure built in Europe, Asia and the Middle East during the Middle Ages by nobility
29,948
 Total number of castles is unknown.
 
cemetery (Q39614): place of burial
382,332
 Total number of cemeteries is unknown.
 
dam (Q12323): barrier that impounds water or underground streams
800,000
 According to International Rivers, by 1997 there were 800,000 dams worldwide, 40,000 over 15m high.[21] (See also GeoNames database)
 
fountain (Q483453): piece of architecture that ejects water
19,893
 Total number of fountains is unknown.
 
gate (Q53060): point of entry to a space enclosed by building, wall or fence
11,761
 Total number of gates is unknown.
 
heritage (Q2434238): property, custom, or other material, immaterial or natural object inherited from previous generations, and conserved for its importance for future generations
1,774,779
 Total number of monuments (heritage) is unknown.
 
horse racing venue (Q11822917): venue used in horse racing
849
 Total number of horse racing venues is unknown.
 
hospital (Q16917): health care facility, for individual buildings use hospital building, for organizations use medical organization
16,500
 According to Cybermetrics Lab, there are 16,500 hospitals worldwide.[22]
 
hotel (Q27686): business enterprise that provides lodging in a single building paid on a short-term basis
180,000
 According to sources, there are 180,000-400,000+ hotels worldwide.[23]
 
house (Q3947): building usually intended for living in
479,538
 Total number of notable houses is unknown.
 
lighthouse (Q39715): structure designed to emit light to aid navigation
24,400
 According to Lighthouse Directory there are 24,400+ lighthouses worldwide.[24]
 
military base (Q245016): facility directly owned and operated by or for the military
11,296
 Total number of military bases is unknown.
 
mine (Q820477): place for the extraction of minerals
52,751
 Total number of mines is unknown.
 
movie theater (Q41253): venue, usually a building, for viewing films
57,449
 Total number of movie theaters is unknown.
 
observatory (Q62832): location used for observing terrestrial or celestial events
3,769
 Total number of observatories is unknown.
 
palace (Q16560): grand residence, especially a royal or episcopal residence
19,819
 Total number of palaces is unknown.
 
park (Q22698): permanently dedicated recreation area, often open to the public and generally characterized by natural, historic, or landscape features
116,485
 Total number of parks is unknown.
 
structure of worship (Q1370598): specially designed structure for use in worshipping
566,887
 Total number of places of worship is unknown. A quick estimate is one place of worship per settlement.

As of 2011, the Catholic Church had 3,068 churches of cathedral and co-cathedral status around the world.[25] Estimations of churches worldwide range from 250,000[26] to 3,700,000,[27] with 450,000 only in USA.[28] There are 2.5 million mosques in the world.[29][30]

 
power station (Q159719): facility generating electric power
28,379
 Total number of power stations is unknown.
 
prison (Q40357): place in which people legally are physically confined and usually deprived of a range of personal freedoms
10,000
 Total number of prisons is unknown. According to sources, there are 4,575 prisons in the United States and 1,029 in Russia.[31] A rough estimate is 10,000 prisons worldwide.
 
research station (Q195339): station that is built for the purpose of conducting scientific research
538
 Total number of research stations is unknown. (See Antarctic research station)
 
reservoir (Q131681): artificial lake impounded using a dam or lock to store water
40,000
 Total number of reservoirs is unknown.
 
school (Q3914): institution for the education of students by teachers
788,623
 Total number of schools is unknown.
 
shopping center (Q11315): complex of shops
8,472
 Total number of shopping centers is unknown.
 
skyscraper (Q11303): very tall building
94,000
 According to SkyscraperPage there are 94,000+ skyscrapers worldwide.[32]
 
square (Q174782): open public spaces in cities or towns, usually rectilinear, surrounded by buildings, and often located at the junction of two or more thoroughfares
22,623
 Total number of squares is unknown.
 
stadium (Q483110): place or venue for (mostly) outdoor sports, concerts, or other events
11,500
 According to World Stadiums there are 11,500+ stadiums worldwide. 689 in Africa, 1,200 in Asia, 286 in Central America, 4,268 in Europe, 527 in Middle East, 2,869 in North America, 284 in Oceania and 1,417 in South America.[33]
 
street (Q79007): public thoroughfare in a built environment
696,930
 Total number of streets is unknown.
 
theatre building (Q24354): building for performances by actors
16,218
 Total number of theatres is unknown.
 
tower (Q12518): structure with height greater than width
49,764
 Total number of towers is unknown.
 
tunnel (Q44377): underground passageway
20,941
 Total number of tunnels is unknown. According to es:Anexo:Túneles de España, in Spain there are 400 road tunnels and 1700 railway tunnels.
 
university (Q3918): academic institution for further education
20,000
 According to Webometrics Ranking of World Universities, there are 20,000+ universities worldwide.[34]
 
watermill (Q185187): structure that uses a water wheel or turbine to drive a mechanical process
6,595
 Total number of watermills is unknown.
 
weather station (Q190107): set of sensors that record and provide physical measurements and meteorological parameters
32,309
 Total number of weather stations is unknown.
 
windmill (Q38720): machine that converts the energy of wind into rotational energy
4,385
 Total number of windmills is unknown.
 
zoo (Q43501): collection of assorted wild animal species kept for purposes like: study, conservation and, or, commercial exhibition
10,000
 According to sources there are 10,000+ zoos worldwide.[35]
 
list of building types (Q3634365): Wikimedia list article
0
0
0
0
 Total number of building types is unknown.
architectural style (Q32880): visual characteristics of a building
1,414
 Total number of architectural styles is unknown.
architecture award (Q1829324): type of award
278
 Total number of architecture awards is unknown.
Total
340,073
1,036,078
5,632,290
11,416,533

Cinema, television and radio edit

(This section excludes biographies) (This section excludes archives)

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
film (Q11424): sequence of images that give the impression of movement, stored on film stock
811,306
 According to Internet Movie Database, there are 667,381 movies and 143,925 TV movies.[36]
 
television series episode (Q21191270): single installment of a television series
7,983,674
 According to Internet Movie Database, there are 7,983,674 TV episodes.[36]
 
television station (Q1616075): organization that transmits content on television
9,642
 According to Federal Communications Commission, there are 1,700+ TV stations (and 2,100+ low power) in USA.[37]
 
television channel (Q2001305): terrestrial frequency or virtual number over which a television station or television network is distributed
6,219
 Total number of TV channels is unknown. According to sources, there are 700+ in India,[38] 7,200 in Europe as of 2009 (UE 27 + Croatia and Turkey).[39] Total number of defunct channels is unknown.
 
television program (Q15416): segment of audiovisual content intended for broadcast on television
190,031
 Total number of TV programs is unknown. Example: list of Spanish television series contains 800+ series and miniseries.
 
radio station (Q14350): organization for the production and transmission of radio programs
30,024
 According to The World Factbook, there are 44,000 radio stations worldwide[40] and according to Federal Communications Commission 14,000+ are in USA.[37]
 
television award (Q1407225): award for excellence of television achievements
509
 Total number of TV awards is unknown.
Total
293,526
21,935
788,279
9,031,405

Literature edit

literature is the art of written works. The word literature literally means: "things made from letters". Literature is commonly classified as having two major forms—fiction and non-fiction—and two major techniques—poetry and prose. (This section excludes #Biographies and #Libraries)

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
academic journal (Q737498): peer-reviewed periodical relating to an academic discipline
35,711
 Total number of academic journals is unknown. See also Journals cited by Wikipedia.
 
scholarly article (Q13442814): article in an academic publication, usually peer reviewed
0
0
91,000,000
 According to sources, over 50 million journal articles have been published since 1665.[41]

Number of records in different academic databases:

See also lists of important publications in science.

 
thesis (Q1266946): general term for a document submitted in support of candidature for an academic degree; Use Q187685 for PhD thesis or Q1385450 for dissertation in general
144,330
 Total number of thesis is unknown.
bibliography (Q1631107): list of books or documents relevant to a particular subject or author
34,417
 Total number of bibliographies is unknown.
comics (Q1004): creative work in which images and text convey information such as narratives
41,980
 Total number of comics is unknown.
 
dictionary (Q23622): work that provides word information such as spelling, definition, gender, pronunciation, etymology, etc., where the information provided depends on the kind of dictionary
38,000
 According to sources, there are 38,000 dictionaries.[51]
 
dictionary entry (Q1580166): part of a dictionary covering a specific word or phrase; the lexicographical information covered depends on the kind of the dictionary; single dictionary entry covers all senses of the word
3
165,877
 Total number of dictionary entries is unknown.
encyclopedia (Q5292): type of reference work
13,000
 According to sources, there are 13,000 encyclopedias.[52]

Some of the most complete encyclopedias are Enciclopedia universal ilustrada europeo-americana (800,000 articles), Encyclopædia Britannica (100,000 articles), Encyclopédie (72,000 articles[53]) and Oxford Reference Online (1,400,000 articles).

See more encyclopedias in Google Books and Internet Archive.

See also list of encyclopedias by language, list of encyclopedias by branch of knowledge and list of online encyclopedias.

 
encyclopedia article (Q13433827): part of encyclopedia, sometimes considered as reference work by itself
805,729
 Total number of encyclopedia articles is unknown.
book (Q571): medium for recording information (words or images) typically on bound pages or more abstractly in electronic or audio form
75,234
 Total number of books (without counting separated editions) is unknown.
version, edition or translation (Q3331189): specific version of a work, resulting from its edition, adaptation, or translation; set of substantially similar copies of a work
158,464,880
 As of 2010, according to Google, there were 129,864,880 books (considering all editions separately).[54] UNESCO estimates that 2.2 million new titles are published every year, so there are roughly 158,464,880 unique books (editions) in the world as of 2023.[55]
codex (Q213924): book with handwritten content
436
 Total number of codices is unknown.
incunable (Q216665): book, pamphlet, or broadside that was printed before the year 1501 in Europe
350,000
 According to sources, there are 350,000 editions, around 1.5 million surviving copies, located in over 5,000 libraries worldwide.[56][57] See also Incunabula Short Title Catalogue (29,777) and Universal Short Title Catalogue (350,000).
manuscript (Q87167): document written by hand
138,078
 Total number of manuscripts is unknown.
discourse (Q190539): generalization of the notion of a conversation to any form of communication
3,919
 Total number of speeches is unknown. See also oral literature.
fictional entity (Q14897293): entity that only exists in a work of fiction
117,901
 Total number of fictional entities (characters, locations, events) is unknown.
magazine (Q41298): publication that is typically distributed at a regular interval
165,680
 Total number of magazines is unknown. According to sources by country:
newspaper (Q11032): scheduled publication containing news of events, articles, features, editorials, and advertising
65,563
 Total number of newspapers is unknown. According to sources by country:
poem (Q5185279): work of poetry, often composed of verses
123,615
 Total number of poems is unknown.
 
play (Q25379): theatrical dramatic work intended to be performed by actors (in theatre, radio or recorded for TV)
25,455
 Total number of plays is unknown.
 
literary award (Q378427): award for authors and literary associations
5,128
 Total number of literature awards is unknown.
Total
107,094
27,326
44,043,680
251,814,933

Performing arts edit

performing arts are a form of art in which artists use their voices and/or their bodies, often in relation to other objects, to convey artistic expression. It is different from visual arts, which is when artists use paint/canvas or various materials to create physical or static art objects. Performing arts include several disciplines, each performed in front of a live audience.

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
musical instrument (Q34379): device created or adapted to make musical sounds
19,876
 Total number of musical instruments is unknown.
 
album (Q482994): grouping of album releases by an artist usually released at the same time with the same title and tracks but in different formats for consumption (digital, CD, LP)
1,000,000
 Total number of albums is over 1,000,000.

The Freedb database holds information for around 1.5 million compact disc (many are duplicates), AllMusic database contains entries for 800,000 unique albums, Discogs database contains over 890,000 master releases (several versions of releases) and nearly 6.5 million unique individual versions of releases,[59] Jamendo project contains over 50,000 free and open albums. Record-Rama collection holds 3 million albums and singles.

New albums in USA: 75,000 (2010), 96,100 (2009), 106,000 (2008), 76,000 (2006)[60]

See also list of online music databases.

 
song (Q7366): musical composition for voice(s)
97,000,000
 According to sources, there are 97 million songs.[61]
 
Total
162,960
2,262
344,007
98,019,876

Visual arts edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
drawing (Q93184): visual artwork in two-dimensional medium
167,821
 Total number of drawings is unknown.
 
painting (Q3305213): visual artwork, surface artistically covered with paint
10,000,000
 Total number of paintings is unknown.

According to Art UK database there are 213,000 artworks contained within the UK's national collection.[62]

See also Wikidata:WikiProject sum of all paintings.

 
photograph (Q125191): image created by light falling on a light-sensitive surface
79,573
 Total number of photographs is unknown.
 
sculpture (Q860861): three-dimensional work of art
622,134
 Total number of sculptures is unknown.
 
Total
23,822
140,777
1,825,689
10,869,528

Geography edit

Human geography edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
sovereign state (Q3624078): state that has the highest authority over a territory
223
 193 member states of the United Nations and historical states.[63]
 
first-level administrative division (Q10864048): administrative division directly subordinate to or under administration of a national government
5,626
 Total number of first-level administrative divisions is unknown.
second-level administrative division (Q13220204): administrative division subordinate to or under administration of a first-level division
57,604
 Total number of second-level administrative divisions is unknown.
third-level administrative division (Q13221722): administrative division subordinate to or under administration of a second-level division
152,855
 Total number of third-level administrative divisions is unknown.
fourth-level administrative division (Q14757767): administrative division subordinate to or under administration of a third-level division
505,050
 Total number of fourth-level administrative divisions is unknown.
fifth-level administrative division (Q15640612): administrative division subordinate to or under administration of a fourth-level division
751,313
 Total number of fifth-level administrative divisions is unknown.
sixth-level administrative division (Q22927291): administrative division subordinate to or under administration of a fifth-level division
32,095
 Total number of sixth-level administrative divisions is unknown.
micronation (Q188443): small, unrecognized country
152
 Total number of micronations is unknown.
 
Total
300,218
125,968
1,504,918
1,504,918

Physical geography edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
continent (Q5107): large landmass identified by convention
57
 Current continents and ancient or hypothesized ones.
 
canal (Q12284): man-made channel for water
65,012
 Total number of canals is unknown.
 
cave (Q35509): natural underground space large enough for a human to enter
2,400
 World Caves Database includes 2,424 caves deeper than 300m (total height) or longer than 3km.[64]
 
desert (Q8514): barren area of land where little precipitation occurs
2,679
 Total number of deserts is unknown.
 
oasis (Q43742): isolated area of vegetation in a desert
184
 Total number of oases is unknown.
 
forest (Q4421): dense collection of trees covering a relatively large area
27,911
 Total number of forests is unknown.
 
glacier (Q35666): large persistent body of ice
100,000
 Total number of glaciers is unknown. According to sources by country:
 
hill (Q54050): landform that extends above the surrounding terrain in lower mountain ranges, smaller than a mountain
328,893
 Total number of hills is unknown.
island (Q23442): piece of sub-continental land completely surrounded by water
100,000
 Total number of islands is unknown. According to sources are approximately 45,000 tropical islands.[68]
 
lake (Q23397): body of relatively still water, localized in a basin
1,000,000
 Total number of lakes is unknown.[69] According to sources by country:
 
mountain (Q8502): large natural elevation of the Earth's surface
530,925
 Total number of mountains is unknown. Mountains Mount includes info over 100,000 mountains.[74] According to sources by elevation:
  • Above 8,000 m (14)
  • Above 7,000 m (???)
  • Above 6,000 m (???)
  • Above 5,000 m (???)
 
mountain range (Q46831): geographic area containing several geologically related mountains
27,274
 Total number of mountain ranges is unknown.
 
river (Q4022): larger natural watercourse
1,000,000
 Total number of rivers is unknown. According to sources, there are 146,000+ in Africa[75] and 104,000+ in Europe.[76] According to sources by country:
 
sea (Q165): large body of saline water
150
 Total number of seas is unknown.
 
volcano (Q8072): natural, surface vent or fissure usually in a mountainous form
1,500
 According to sources, there are over 1,500 volcanoes worldwide.[96]
 
Total
117,539
80,144
2,073,932
3,186,985

History edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
calendar day of a given year (Q47150325): specific date (day) of a given year in Gregorian or Julian calendars. See property "point in time" (P585).
200,420
 Total number of calendar days is unknown.
event (Q1656682): temporary and scheduled happening, like a conference, festival, competition or similar
1,238,689
 Total number of events is unknown.
events in a specific year or time period (Q18340514): facts and events ranged in chronological order
200,000
 Assuming 200 countries and 1,000 years, there could be 200,000 articles. See also list of time periods, history by period, Category:Year lists and list of calendars.
disaster (Q3839081): hazard resulting in an event causing significant physical damage, destruction or death
12,335
 Total number of disasters is unknown.
public election (Q40231): process by which a population chooses the holder of a public office
75,538
 Total number of elections is unknown.
time of day (Q1260524): type of occurrence
86,400
 A day can be divided into 86,400 seconds.
Total
519,384
99,353
1,663,806
1,813,382

GLAM edit

Glam is an acronym for "galleries, libraries, archives, and museums", although other versions of the acronym exist, such as LAM, which incorporates only libraries, archives, and museums. More generally, GLAMs are publicly funded, publicly accountable institutions collecting cultural heritage materials. (For books and publications, see #Literature)

  • An archive is an accumulation of historical records, or the physical place they are located. Archives contain primary source documents that have accumulated over the course of an individual or organization's lifetime, and are kept to show the function of that person or organization.
  • A library is an organized collection of information resources made accessible to a defined community for reference or borrowing. It provides physical or digital access to material, and may be a physical building or room, or a virtual space, or both.
  • A museum is an institution that cares for (conserves) a collection of artifacts and other objects of scientific, artistic, cultural, or historical importance and makes them available for public viewing through exhibits that may be permanent or temporary.
Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
archive (Q166118): agency or institution responsible for the preservation and communication of records selected for permanent preservation
22,008
 Total number of archives is unknown. According to sources by country:
 
library (Q7075): institution charged with the care of a collection of literary, musical, artistic, or reference materials, such as books, manuscripts, recordings, or films
72,000
 According to OCLC, there are 72,000+ libraries in 170 countries.[99] According to sources by country:

According to sources by size:

See also list of national and state libraries, list of the largest libraries in the United States, list of libraries in the ancient world, list of destroyed libraries and list of digital library projects.

 
museum (Q33506): institution that holds artifacts and other objects of scientific, artistic, cultural, historical, or other importance
55,000
 According to The World Museum Community, there are 55,000+ museums in 202 countries.[135] About 17,673 museums in Europe, based on 2003 and 2008 figures.[136] According to sources by country:

According to sources by size:

See also list of national museums.

 
collection (Q2668072): set of purposefully gathered physical or digital objects with some common characteristics
770,694
 Total number of collections is unknown.
 
Total
47,892
51,540
969,524
919,702

Science edit

Astronomy edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
galaxy (Q318): large gravitationally bound system of stars and interstellar matter
2,459,296
 Total number of galaxies in the observable universe ranges from 2*10^11 to 2*10^12.
 
star (Q523): astronomical object consisting of a luminous spheroid of plasma held together by its own gravity
1,811,709,771
 Total number of stars in the observable universe ranges from 10^22 to 10^24. Only a tiny fraction have been described, about 1,811,709,771 in the Gaia Data Release 3 by the Gaia European space mission.[145]
 
black hole (Q589): astronomical object so massive, that anything falling into it, including light, cannot escape its gravity
6
3
13
 Total number of black holes is unknown.
 
pulsar (Q4360): highly magnetized, rapidly rotating neutron star or white dwarf
2,797
 Total number of pulsars is unknown.
 
supernova (Q3937): star exploding at the end of its stellar lifespan
14,479
 Total number of supernovae is unknown.
 
exoplanet (Q44559): any planet beyond the Solar System
9,955
 Total number of exoplanets is unknown.
 
natural satellite (Q2537): celestial body that orbits a planet or other smaller body in turn directly orbiting a star
449
 Total number of natural satellites is unknown.
 
asteroid (Q3863): minor planet of the inner Solar System; not a comet
248,389
 Total number of asteroids is unknown.
 
comet (Q3559): icy small astronomical object
1,306
 Total number of comets is unknown.
 
astronomical radio source (Q1931185): object in outer space that emits strong radio waves
391,407
 Total number of radio sources is unknown.
Total
39,070
7,441
7,613,184
1,814,837,862

Biology edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
domain (Q146481): taxonomic rank (for "ordinary" organisms thus not viruses)
3
2
6
6
 According to sources, there are 3 domains.
 
kingdom (Q36732): taxonomic rank
5
38
 Total number of kingdoms is unknown.
phylum (Q38348): main taxonomic rank (under the rank kingdom)
309
 Total number of phyla is unknown.
class (Q37517): taxonomic rank
1,017
 Total number of classes is unknown.
order (Q36602): taxonomic rank
3,631
 Total number of orders is unknown.
family (Q35409): taxonomic rank (or a taxon at that rank) between order and genus
21,814
 Total number of families is unknown.
genus (Q34740): taxonomic rank used in the biological classification of living and fossil organisms, and viruses
271,016
 Total number of genera is unknown.
species (Q7432): one of the basic units of biological classification and a taxonomic rank
8,000,000
 Acording to sources, there are 8 million species.[146] More than 99% of all species, amounting to over 5 billion species,[147] that ever lived on Earth are extinct.[148][149][150]
 
cell line (Q21014462): no description
148,684
 Total number of cell lines is unknown.
gene (Q7187): basic physical and functional unit of heredity
1,263,121
 Total number of genes is unknown.
 
protein (Q8054): biomolecule consisting of chains of amino acid residues
1,021,176
 Total number of proteins is unknown.
 
non-coding RNA (Q427087): class of RNA that is not translated into proteins
2
115,742
 Total number of non-coding RNA is unknown.
Total
476,177
251,413
6,020,052
10,846,554

Chemistry and physics edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
chemical compound (Q11173): pure chemical substance consisting of two or more different chemical elements
0
0
60,000,000
 According to CAS Registry Number, there are 60 million chemical compounds[151] (with a growth of 10 million in less than two years). See also list of minerals.
 
Total
0
0
1,146,000
60,000,000

Health edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
clinical trial (Q30612): phase of clinical research in medicine
4
391,962
 Total number of clinical trials is unknown.
disease (Q12136): abnormal condition negatively affecting organisms
12,000
 According to sources, there are 12,000 diseases.[152] See also Category:Animal diseases and lists of plant diseases.
 
drug (Q8386): chemical substance having an effect on the body
21,000
 According to sources, there are 21,000 drugs.[153]
 
Total
6,368
2,079
415,688
424,962

Mathematics edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
number (Q11563): mathematical object used to count, label, and measure
296,541
 According to mathematics, there are ℵ0 (infinite) numbers, integers and reals.
 
prime number (Q49008): positive integer with exactly two divisors, 1 and itself
127,550
 According to mathematics, there are ℵ0 (infinite) prime numbers.
 
integer sequence (Q2297602): ordered succession of integers, defined by a formula, recurrence, or property of its members
200,000
 According to sources, there are over 200,000 integer sequences.[154]
Total
2,478
15,069
424,284
624,091

Research edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
research project (Q1298668): project of one or more scientists, or of an organization in a scientific field
473,085
 Total number of research projects is unknown.
Total
1,183
297
473,085
473,085

Society edit

A society is a group of people related to each other through persistent relations, or a large social grouping sharing the same geographical or virtual territory, subject to the same political authority and dominant cultural expectations.

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
human (Q5): any member of Homo sapiens, unique extant species of the genus Homo, from embryo to adult
0
0
108,000,000
 Total number of notable biographies is unknown. As of March 2017, Wikidata included 2,653,023 male biographies and 530,490 female biographies.[155] That is a gender ratio of 5:1. As of 2024, English Wikipedia contains 2,226,465 biographies.

We could assume that in an average city with a population of 100,000 inhabitants there are 100 notable people: artists, scientists, writers, politicians, sportspeople and many more. If we agree with that, it means a 1 of 1000 notability rate. If the world population is about 8,000,000,000, we have 8,000,000,000/1,000 = 8,000,000 notable biographies of living people (BLP). Or given the fact that there are about 360,000 births per day,[156] around 360 notable people are born each day.

But we have to look into the past centuries too. The number of people who have ever been born is around 100,000,000,000.[157] That gives us an estimate of 100,000,000 notable biographies (plus 8,000,000 BLP) in human history, but hardly there is information about that much people who lived in ancient times. Anyway, a rough estimate is over 108,000,000 notable biographies.

Lists of people by occupation (cat) and nationality are desirable too. According to Wikidata, there are over 9,115 occupations (over 6,841 with an English label).[158] See also Category:Obsolete occupations.

 
given name (Q202444): name typically used to differentiate people from the same family, clan, or other social group who have a common last name
112,358
 Total number of given names is unknown.
 
family name (Q101352): part of a naming scheme for individuals, used in many cultures worldwide
640,198
 Total number of family names is unknown.
 
business (Q4830453): organization undertaking commercial, industrial, or professional activity
581,219
 Total number of business is unknown.
craft (Q2207288): field of work that requires particular skills and knowledge of skilled work
2,006
 Total number of crafts is unknown.
organization (Q43229): social entity established to meet needs or pursue goals no value
 no value
4,179,657
 Total number of organizations is unknown.
position (Q4164871): social role with a set of powers and responsibilities within an organization
212,031
 Total number of positions is unknown.
Total
212,077
289,932
16,931,883
113,727,469

Technology edit

technology is the making, modification, usage, and knowledge of physical tool, machine, techniques, craft, system, methods of organization, in order to solve a problem, improve a preexisting solution to a problem, achieve a goal or perform a specific function. It can also refer to the collection of such tools, machinery, modifications, arrangements and procedures. Technologies significantly affect human as well as other animal species' ability to control and adapt to their natural environments. See also w:Category:Technology-related lists.

Inventions edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
patent (Q253623): monopoly granted on a new invention
4
240,659
 Total number of patents is unknown. Patents databases:
Total
4
12
240,659
240,659

Software edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
application (Q166142): software program or group of programs designed for end-users
115,171
 Total number of applications is unknown. According to repositories:
 
Total
33,059
2,902
115,171
115,171

Transport edit

Topic Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5] Image
road (Q34442): wide way leading from one place to another, especially one with a specially prepared surface which vehicles can use
36,118,087
 According to the CIA World Factbook, there are 36,118,087 roads in the world[162][163]
 
Total
30,016
45,217
121,203
36,118,087

Special pages edit

Page type Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5]
Wikimedia category (Q4167836): use with 'instance of' (P31) for Wikimedia category
0
0
5,509,668
 Total number of required categories is unknown.
Wikimedia disambiguation page (Q4167410): type of wiki page usually in main namespace (article namespace, ns=0) containing links to articles with similar names, and very little details only, use with P31 "instance of"
1,571,334
 Total number of required disambiguation pages is unknown.
Wikimedia list article (Q13406463): page of a Wikimedia project with a list of something
513,206
 Total number of required lists is unknown.
Wikimedia portal (Q4663903): pages on a Wikimedia wiki intended to serve as "Main Pages" for specific areas of knowledge or information, or for specific audiences and activities. Use with P31 'instance of' for them
5,854
 Total number of required portals is unknown.
Wikimedia template (Q11266439): type of page in the Wikimedia system. Use with P31 'instance of' for template pages
1,017,478
 Total number of required template pages is unknown.
Total
1,000,867
48,707
8,617,540
8,617,540

Datasets edit

Dataset Enwiki[n 1] Commons[n 2] Wikidata[n 3] Estimate[n 4] References[n 5]
IMDb ID (P345) no value
 no value
 no value
 30,998,431
 As of 2024, this dataset includes 17,855,335 titles and 13,143,096 names.[164]
Freebase ID (P646) no value
 no value
 no value
 7,451,019
 This dataset includes 7,451,019 objects.
SIMBAD ID (P3083) no value
 no value
 no value
 17,094,596
 As of 2024, this dataset includes 17,094,596 objects.[165]
Internet Archive ID (P724) no value
 no value
 no value
 no value
Open Library ID (P648) no value
 no value
 no value
 no value
OCLC control number (P243) no value
 no value
 no value
 no value

Sister projects edit

Sister project Articles Categories Images Estimate References
Abstract Wikipedia (Q96807071): Wikimedia project using Wikifunctions, Wikidata and various components focusing on extending and complement Wikipedia on all its supported languages (this is not a wiki)
Wikibooks (Q367): collaborative development of free textbooks
Wikidata (Q2013): free knowledge graph hosted by Wikimedia and edited by volunteers
Wikifunctions (Q104587954): Wikimedia project for maintaining an open library of reusable code
Wikimedia Commons (Q565): online repository of free-use image, sound, and other media files; part of the Wikimedia ecosystem
Wikinews (Q964): open-content online news written and edited by volunteers
Wikiquote (Q369): open collection of quotes that anyone can edit
Wikisource (Q263): online library that collects open-content source material
Wikispecies (Q13679): open online species directory that anyone can edit 867,056
Wikiversity (Q370): Wikiproject focused on learning, teaching, research, service and ideas materials and activities
Wikivoyage (Q373): free online travel guide that anyone can edit
Wiktionary (Q151): free online dictionary that anyone can edit

Destroyed knowledge edit

See Wikipedia:There is a deadline

Notes edit

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 Number of articles that currently exists in English Wikipedia for this topic.
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 Number of categories that currently exists in Wikimedia Commons for this topic.
  3. ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 3.20 3.21 Number of items that currently exists in Wikidata for this topic.
  4. ↑ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 4.18 4.19 4.20 4.21 Number of articles/categories/items that should exists in English Wikipedia/Wikimedia Commons/Wikidata for this topic to consider these projects complete.
  5. ↑ 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 5.12 5.13 5.14 5.15 5.16 5.17 5.18 5.19 5.20 5.21 Notes, sources, references and other relevant information about this topic.

References edit

  1. ↑ "10,000,000,000,000,000 bytes archived!". Collections Team blog. Internet Archive. October 26, 2012. Archived from the original on 2013-05-20. Retrieved 2012-10-27. On Thursday, 25 October, hundreds of Internet Archive supporters, volunteers, and staff celebrated addition of the 10,000,000,000,000,000th byte to the Archive’s massive collections.
  2. ↑ "Mirroring Wikimedia project XML dumps". Meta-Wiki. 2013-05-20. Archived from the original on 2013-05-20. Retrieved 2013-05-20. All dumps currently hosted: about 27TB and growing, as of Jan 2012.
  3. ↑ "Editing will temporarily pause for a failover test". Wikimedia Blog. 2017-04-18. Retrieved 2017-04-18.
  4. ↑ "Special:Statistics". English Wikipedia. 2024-04-23. Retrieved 2024-04-23. Content pages: 6,815,512
  5. ↑ "Special:Statistics". Wikidata. 2024-04-23. Retrieved 2024-04-23. Content pages: 109,406,002
  6. ↑ "Vivian Maier".
  7. ↑ "The Archive". 2009.
  8. ↑ "Usenet Archive of UTZOO Tapes". 2001-12-11.
  9. ↑ "A Dream to Preserve TV News, on the Road to Realization... with Your Help". 2013-11-22.
  10. ↑ "Using the British Library". Archived from the original on 2014-10-18. Retrieved 2015-02-24. The British Library is the UK’s national library and one of the world’s leading research libraries. Our collection of around 170 million items includes some of the most iconic treasures from a variety of cultures and includes books, manuscripts, maps, newspapers, patents and sound recordings.
  11. ↑ 2012 At A Glance
  12. ↑ "Russian State Library". Official library website. Retrieved 20 November 2010.
  13. ↑ "Annual Report of the National Diet Library. Trends of the past year". 2008. Archived from the original (PDF) on 2012-03-13. Retrieved 2010-07-15.
  14. ↑ "National Library of China - Visit Us. Overview of Library Collections". 2010. Retrieved 2012-09-28.
  15. ↑ "BnF - ABC of the collections: N for Numerous". 2011-06-23. Archived from the original on 2012-02-29. Retrieved 2015-02-24.
  16. ↑ "History of the Aquarium". Vancouver Aquarium. 2013-05-20. Archived from the original on 2009-01-23. Retrieved 2013-05-20. When the Vancouver Aquarium opened in 1956, there were five aquariums in North America, of which Vancouver was the fifth. Today, there are approximately 48, only two of which are in Canada. Worldwide, the number of aquariums has grown to over 200.
  17. ↑ https://www.infrastructurereportcard.org/wp-content/uploads/2017/01/Bridges-Final.pdf
  18. ↑ https://www.bmvi.de/SharedDocs/DE/Artikel/StB/bruecken-zahlen-daten-fakten.html
  19. ↑ https://www.czso.cz/csu/xc/infrastruktura-silnicni-dopravy-k-1-1-2016
  20. ↑ "Lista de plazas de toros". Retrieved 2024-02-13.
  21. ↑ "Is it Worth a Dam?". Environmental Health Perspectives. 1997. Archived from the original on 2006-05-17. Retrieved 2013-05-20. Worldwide, some 40,000 "large" dams (over 15 m high, according to the International Commission on Large Dams) and about 800,000 smaller ones have been constructed.
  22. ↑ "Ranking Web of World Hospitals". Cybermetrics Lab. 2015. Retrieved 2015-02-24. The new edition is built from data collected in January 2015 for more than 16 500 Hospitals websites from all over the World.
  23. ↑ "How many hotels in the world are there anyway? Booking.com keeps adding them". Dennis Schaal. 2013-05-22. Archived from the original on 2013-05-22. Retrieved 2013-05-22. Booking.com says it offers 202,842 hotels globally. STR Global estimates that there are 187,000 hotels, offering 17.5 million guest rooms, around the globe. Other less-than-scientific guesstimates put the number of hotels around the world at around 400,000, with an additional 100,000 or so if you include B&Bs and hostels etc. In a similar vein, one of the global distribution systems informally uses 500,000 as a guide to the number of hotels in the world, although this number would exclude hostels, guest houses and motels.
  24. ↑ "The Lighthouse Directory". Welcome to the Lighthouse Directory, providing information and links for more than 24,400 of the world's lighthouses. Unknown parameter |acessdate= ignored (|access-date= suggested) (help)
  25. ↑ lists of cathedrals
  26. ↑ "Catholicism: How many physical Catholic churches are there in the world?".
  27. ↑ "How many churches are there in the world?".
  28. ↑ "Fun Fact: There are more churches (450,000) in the USA than there are convenience stores (146,341), fast food restaurants (160,000), and hotels/motels (46,295, not counting casino hotels) combined (352,636 total)".
  29. ↑ "How Many Mosques Are There in the World?". Retrieved 2014-08-06.
  30. ↑ "How many Mosques are there in the world?". Retrieved 2014-08-06.
  31. ↑ "US has more prisoners, prisons than any other country". Retrieved 2014-01-18.
  32. ↑ "SkyscraperPage.com". 2013-05-20. Archived from the original on 2013-05-20. Retrieved 2013-05-20. 93,962 Structures (2013), 89,160 Structures (2012), 72,609 Structures (2010)
  33. ↑ "Stadiums in the United States". World Stadiums. 2013-05-20. Archived from the original on 2012-05-28. Retrieved 2013-05-20.
  34. ↑ "Ranking Web of World Universities". Archived from the original on 2012-06-06.
  35. ↑ "Zoos by Country 2024". Retrieved 2024-02-13. The American Zoo and Aquarium Association (AZA) reports a staggering 10,000 zoos worldwide, reflecting the global popularity of these wildlife sanctuaries.
  36. ↑ 36.0 36.1 "IMDb Database Statistics". IMDb. 2024-02-10. Archived from the original on 2017-02-04. Retrieved 2017-02-04. Titles: 17,855,335; Names: 13,143,096
  37. ↑ 37.0 37.1 "How Many TV and Radio Stations are There?". Federal Communications Commission. 2011. Archived from the original on 2012-06-06. Retrieved 2013-05-21. As on March 2011: 14,728 full power radio stations: 4,778 AM, 6533 FM, and 3,417 educational FM. There are 859 Low Power FM stations. 1,774 full power TV stations: 1,022 UHF commercial, 360 VHF commercial, 285 UHF educational, and 107 VHF educational. 10,595 translators and booster stations. 2,172 low power TV stations.
  38. ↑ 38.0 38.1 "The wonder that is media". Paranjoy Guha Thakurta. 2013-05-21. Archived from the original on 2012-05-25. Retrieved 2013-05-21. There are over 72,000 publications currently registered with the Registrar of Newspapers of India. At present, over 700 TV channels have been permitted by the Ministry of Information and Broadcasting to uplink or downlink from the country.
  39. ↑ "Croissance du nombre de chaînes et de plates-formes de télévision européennes malgré la crise". Observatoire européen de l'audiovisuel. 2010-01-13. Archived from the original on 2013-05-21. Retrieved 2013-05-21. Plus de 245 nouvelles chaînes de télévision ont été lancées en Europe en 2009 ; ce qui mène à la fin de l’année 2009 à un total de 7 200 chaînes de télévision européennes.
  40. ↑ "How many radio stations are there in the world?". Wiki Answers. 2013-05-21. Archived from the original on 2013-05-21. Retrieved 2013-05-21. There are about 44,000 radio stations worldwide.
  41. ↑ 41.0 41.1 Jinha, A. E. (2010). "Article 50 million: An estimate of the number of scholarly articles in existence". Learned Publishing. 23 (3): 258–263. doi:10.1087/20100308. Archived from the original (PDF) on 2012-05-23.
  42. ↑ "ScienceOpen". Retrieved 2024-02-12. 91 million publications, 25,000 journals, 32 million authors.
  43. ↑ Scholia Statistics
  44. ↑ "Internet Archive Scholar". Retrieved 2024-02-12. This fulltext search index includes over 35 million research articles and other scholarly documents preserved in the Internet Archive. The collection spans from digitized copies of eighteenth century journals through the latest Open Access conference proceedings and preprints crawled from the World Wide Web.
  45. ↑ "Europe PubMed Central". Retrieved 2024-02-12. Research articles (34.974.606)
  46. ↑ "IET Inspec". Retrieved 2024-02-12. It contains over 20 million records of research literature from hundreds of trusted global publishers.
  47. ↑ "Compendex on Engineering Village". Retrieved 2024-02-12. 10.3M+ papers from 150,000+ conference proceedings.
  48. ↑ "PubMed Central". 9.7 million articles are archived in PMC.
  49. ↑ "About IEEE Xplore". Retrieved 2024-02-12. IEEE Xplore contains more than 6 million documents and other materials from some of the world's most cited publications in electrical engineering, computer science, and related sciences. The content in IEEE Xplore comprises: Over 1.5 million research articles, Over 4 million conference papers, Over 14,000 technical standards, Over 66,000 books and book chapters, Over 500 online educational courses. Approximately 25,000 new content items are added to IEEE Xplore each month.
  50. ↑ "arXiv.org". Retrieved 2024-02-12. arXiv is a free distribution service and an open-access archive for nearly 2.4 million scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics.
  51. ↑ "Dictionary" search on Open Library (Q1201876)
  52. ↑ "Encyclopedia" search on Open Library
  53. ↑ http://encyclopedie.uchicago.edu/
  54. ↑ "Books of the world, stand up and be counted! All 129,864,880 of you". Google Books. 2010-08-05. Archived from the original on 2012-06-06. Retrieved 2010-08-05. After we exclude serials, we can finally count all the books in the world. There are 129,864,880 of them. At least until Sunday.
  55. ↑ How Many Books Are In The World?
  56. ↑ "Incunabula Short Title Catalogue". 2013-05-21. Archived from the original on 2013-05-21. Retrieved 2013-05-21. The database records nearly every item printed from movable type before 1501, but not material printed entirely from woodblocks or engraved plates. 29,777 editions are listed as at January 8th 2008, including some 16th-century items previously assigned incorrectly to the 15th century.
  57. ↑ Universal Short Title Catalogue
  58. ↑ 58.0 58.1 China.org.cn - Mass Media (Template:Webarchive)
  59. ↑ "Discogs - search". Discogs (Q504063). Retrieved 4 November 2015.
  60. ↑ Business Matters: 75,000 Albums Released In U.S. In 2010 -- Down 22% From 2009
  61. ↑ There Are 97,000,000 Songs In This World...Template:Dead link
  62. ↑ "BBC - Your Paintings". BBC Online (Q747860). BBC (Q9531). Retrieved 4 November 2015.
  63. ↑ "United Nations Member States".
  64. ↑ "Caves of the world". 2013-05-26. Archived from the original on 2013-05-26. Retrieved 2013-05-26. Number of caves = 2424; Caves deeper than 300m = 1075; Caves longer than 3kms = 1628
  65. ↑ "Kyrgyzstan Glaciers". Archived from the original on 2013-08-07. Glaciers, (8000 of them – one source says 8208), and permanent snow cover some 8100 square kilometers - about 30% of the total land area of the Kyrgyz Republic. The glaciers themselves cover about 4% of the surface area of the country.
  66. ↑ "How many Alaska glaciers? No easy answer". Archived from the original on 2014-07-27. Retrieved 2014-07-27. Not long ago, a glaciologist wrote that the number of glaciers in Alaska "is estimated at (greater than) 100,000." That fuzzy number, perhaps written in passive voice for a reason, might be correct. But it depends upon how you count.
  67. ↑ "Alaska's Glaciers". Archived from the original on 2013-08-07. 745 Feature records have been selected from GNIS.
  68. ↑ island (Q23442)
  69. ↑ "Which country has the most lakes?".
  70. ↑ "Belarus Overview". Archived from the original on 2013-08-08. There are more than 20,000 rivers and creeks and about 11,000 lakes in Belarus.
  71. ↑ "The Atlas of Canada". Archived from the original on 2012-04-15. 31,752+larger than 3 km² (2-3 million in total)
  72. ↑ "Lakes in Finland". Archived from the original on 2013-05-17. There are 187,888 lakes in Finland. Lake is here defined as a body of standing water larger than 5 ares (500 m2). 56,000 over 10,000 m²
  73. ↑ Data available for 150,000, only 75,000 with name, 57,000 in sv:Kategori:Listor över Sveriges insjöar
  74. ↑ "Mountains Mount". 2012-05-30. Archived from the original on 2012-05-30. Retrieved 2013-05-26.
  75. ↑ "Cartographic river drainage databases". Archived from the original on 2013-05-18.
  76. ↑ "More than half of Europe's rivers fail ecological targets, report finds".
  77. ↑ According to unknown sources there are 8,188 rivers less than 25 km, only 24 rivers over 100 km.
  78. ↑ "National Aquaculture Sector Overview - Brazil".
  79. ↑ "China - Geography and population". FAO.
  80. ↑ "28,000 Rivers Disappeared in China: What Happened?".
  81. ↑ "El Salvador - Physical Features".
  82. ↑ "HYDRO ENERGY".
  83. ↑ "Hydropower, indigenous peoples' rights and popular resistance in Guatemala" (PDF).Template:Dead link
  84. ↑ "Water and hydropower Resources of the Kyrgyz Republic".
  85. ↑ "Воды". Archived from the original on 2013-05-18. 2,044 over 10 km
  86. ↑ "Nepal River Conservation Trust". Archived from the original on 2012-03-05. The latest data shows that Nepal has got over 6000 rivers and streams which have got hydropower potential.
  87. ↑ "Panama - Geography". Nearly 500 rivers lace Panama's rugged landscape. Mostly unnavigable, many originate as swift highland streams, meander in valleys, and form coastal deltas.
  88. ↑ "Inland fisheries of Europe". In addition to the dominating Danube, Romania has over 4,000 rivers having watersheds larger than 10 km2 and a total length exceeding 60,000 km.
  89. ↑ "Russia:: Rivers and Lakes". Among its 100,000 rivers, Russia contains some of the world's longest. Four of the country's five longest rivers—the Ob-Irtysh, Amur, Lena, and Yenisey—are in Siberia.
  90. ↑ "Russia - Water report". Archived from the original on 2013-11-07. There are 120,000 rivers over 10 km long. Their total length within the Russian Federation equals 2.3 million km
  91. ↑ "Spain - Rivers". Of the roughly 1,800 rivers and streams in Spain, only the Tagus is more than 960 kilometers long; all but 90 extend less than 96 kilometers.
  92. ↑ "FAO Fishery Country Profile - UKRAINE". Ukraine has about 71,000 rivers, with a total length of 248,000 km. Among them, 3,212 rivers have a length of more than 10 km and total 73,700 km in length.
  93. ↑ "River Facts". Archived from the original on 2011-08-07.)
  94. ↑ "Wikipedia talk:WikiProject Rivers". 2,000,000+ including small streams
  95. ↑ "Venezuela - Rivers". The Orinoco is by far the most important of the more than 1,000 rivers in the country.
  96. ↑ "How many volcanoes are there in the world?". Archived from the original on 2012-05-25.
  97. ↑ "Censo-Guía de Archivos de España e Iberoamérica". Archived from the original on 2013-08-07.
  98. ↑ 98.0 98.1 98.2 "Libraries, Archives, Museums and Publishing Online Statistics Tables". Archived from the original on 2013-08-07.
  99. ↑ "OCLC President's Report". Archived from the original (PDF) on 2013-08-07.
  100. ↑ "Burundi - Libraries and museums". There are 60 public libraries in Burundi, with the largest in and around the capital. Libraries in Bujumbura include the Public Library, which has 27,000 volumes; the library of the University of Burundi, with 192,000 volumes; and a specialized collection at the Department of Geology and Mines. The French Cultural Center in Bujumbura holds 33,000 volumes.
  101. ↑ "How many libraries are in Canada?". Archived from the original on 2013-08-07.
  102. ↑ "Croatia - Libraries and museums". In 1995, the country reported having 232 public libraries with a combined collection of 4.6 million volumes.
  103. ↑ "Cuba cuenta con más de 400 bibliotecas públicas en todo el territorio nacional, incluidas las situadas en las montañas".
  104. ↑ "Czech Republic - Libraries and museums". In 1997, the Czech Republic had 6,245 public libraries with 53.7 million volumes and 1.4 million registered users.
  105. ↑ "Denmark - Libraries and museums". As of 2002, there were 250 free public libraries throughout the country with 892 points of service. That year, the public libraries had a total of more than 31.4 million volumes.
  106. ↑ "Finland - Libraries and museums". There are about 400 research and university libraries in Finland, most of which are small. In 1997 there were 436 central public libraries and 1,202 branch libraries.
  107. ↑ 107.0 107.1 "Report on the situation of libraries, museums and archive". Archived from the original on 2013-08-07. In Finland there were 439 public libraries having 1006 branches and 370 research libraries with 465 branches in 1996. The total number of library units was 1471. The total number of museums in Finland is 280, of which 139 are cultural history museums, 71 special museums, 55 art museums and 17 natural history museums.
  108. ↑ 108.0 108.1 "France - Libraries and museums". In 1997 there were 1,620 central public libraries with a combined total of more than 89.8 million volumes. There are more than 1,000 museums in France.
  109. ↑ "FYI France".
  110. ↑ 110.0 110.1 "Germany - Libraries and museums". As of 1997, Germany had 6,313 public libraries with 149 million volumes in total. Germany has more than 4,500 state, municipal, association, private, residential, castle, palace, and church and cathedral treasures museums, which annually attract over 100 million visitors.
  111. ↑ "Greece - Libraries and museums". In 1997, there were 672 public libraries with a total of 9.1 million volumes
  112. ↑ 112.0 112.1 "Hungary - Libraries and museums". As of 1997, there were 3,518 regional public libraries located throughout the country. There were over 500 museums (about 70 in Budapest) and many zoological and botanical gardens.
  113. ↑ 113.0 113.1 "Iceland - Libraries and museums". There were a total of 187 public libraries with combined holdings of 1.9 million volumes in 1997. Iceland has more than 50 museums.
  114. ↑ "Latvia - Libraries and museums". In 1997, the country counted 998 public libraries housing 14.9 million volumes.
  115. ↑ "Lithuania - Libraries and museums". In 1997, there were 1,478 public libraries in the country.
  116. ↑ 116.0 116.1 "Morocco - Libraries and museums". Of the 18 public libraries in Morocco, the largest is in Casablanca, with almost 360,000 volumes.
  117. ↑ "Netherlands - Libraries and museums". In 1997 there were 579 main public libraries with a combined collection of 41.5 million books.
  118. ↑ "Korea, Democratic People's Republic of (DPRK) - Libraries and museums". The DPRK has more than 200 public libraries, the largest being the Grand People's Study House in P'yongyang, with 20 million volumes.
  119. ↑ "Norway - Libraries and museums". Norway's 1,108 public libraries had 20.5 million volumes in 1997.
  120. ↑ "Panama - Libraries and museums". There are more than 40 other public libraries and branches.
  121. ↑ 121.0 121.1 "Peru - Libraries and museums". There are nearly 200 public libraries in Peru, the largest of them in Callao, Arequipa, and Lima. More than 250 public and private museums.
  122. ↑ 122.0 122.1 "Poland - Libraries and museums". In 1997 there were 9,230 public libraries, jointly holding almost 135 million volumes. Of the more than 500 museums in Poland...
  123. ↑ 123.0 123.1 "Portugal - Libraries and museums". In 1997 the country had 168 public libraries with 4.8 million volumes. There are some 300 museums in Portugal.
  124. ↑ 124.0 124.1 "Romania - Libraries and museums". In 1997, the country had over 2,950 public libraries holding a total collection of 50.5 million volumes. Romania has some 400 museums.
  125. ↑ 125.0 125.1 "Russia - Libraries and museums". In 1995, the country counted 50,032 public libraries, holding in total 983.4 million volumes. Russia has over 1,000 museums.
  126. ↑ 126.0 126.1 "Sweden - Libraries and museums". In 1997, Sweden had 324 public libraries. Sweden has about 200 museums.
  127. ↑ "Tanzania - Libraries and museums". The Tanzania Library Service was established in 1964. It maintains the National Central Library in Dar es Salaam (656,000 volumes), 16 public libraries, school library service, and a rural extension service.
  128. ↑ "Tunisia - Libraries and museums". The collections of Tunisia's approximately 250 public libraries hold over 2.7 million volumes.
  129. ↑ "Ukraine - Libraries and museums". In 1995, there were reported to be 21,857 public libraries operating in Ukraine with an overall stock of 336.7 million books.
  130. ↑ "Library Copyright Alliance". Archived from the original (PDF) on 2012-05-23.
  131. ↑ "Zimbabwe - Libraries and museums". There were more than 150,000 registered public library users using 76 public libraries holding 1.1 million volumes in 1989. In 1990, 100,000 people visited Zimbabwe's 11 museums.
  132. ↑ Books, manuscripts, journals, newspapers, magazines, sound and music recordings, videos, play-scripts, patents, databases, maps, stamps, prints, drawings. 14 million are books, 3 million recordings. See also British Library Sound Archive (Q4970294).
  133. ↑ "About the Smithsonian". Archived from the original on 2012-06-06.
  134. ↑ "Carl Malamud Answers: Goading the Government To Make Public Data Public". Archived from the original on 2012-06-06.
  135. ↑ "Frequently Asked Questions". The World Museum Community. Archived from the original on 2013-08-07.
  136. ↑ "The Cost of Digitising Europe's Cultural Heritage". Archived from the original (PDF) on 2013-11-09. There are approximately 17,673 museums in Europe, based on figures submitted between 2003 and 2008
  137. ↑ "Arts and Culture in Australia: A Statistical Overview, 2010". According to Museums, Australia, 2007-08 (cat. no. 8560.0) there were 1,019 museums operating from 1,276 locations in Australia at the end of June 2008. These locations included 768 social history museums, 425 historic properties and sites, and 83 other museums.
  138. ↑ "Interesting Facts About Canadian Museums". Canada has more than 2,400 museums, which have more than 24,000 paid employees and 55,000 volunteers, and receive nearly 54 million visits annually.
  139. ↑ "Museums in Germany – where history and culture are brought to life". Archived from the original on 2013-08-07. The 4,000 or so museums in Germany serve as worlds of discovery and use exciting concepts to explore art and history, technology and architecture, literature and the natural world.
  140. ↑ "How many museums in Pakistan?".
  141. ↑ "Visit museums in Spain".
  142. ↑ "Frequently asked questions". Museums Association. Archived from the original on 2013-08-07. It is estimated that there are about 2,500 museums in the UK, depending on what you include. Over 1,800 museums have been accredited by the Museums, Libraries and Archives Council (MLA).
  143. ↑ "How many museums are there in the United States?". American Association of Museums. Archived from the original on 2012-07-10.
  144. ↑ "Atlas database". Louvre museum. Archived from the original on 2012-06-06.
  145. ↑ Gaia Archive
  146. ↑ How Many Species Are There on Earth and in the Ocean?
  147. ↑ Kunin, W.E.; Gaston, Kevin, eds. (31 December 1996). The Biology of Rarity: Causes and consequences of rare—common differences. ISBN 978-0412633805. Retrieved 26 May 2015.
  148. ↑ Stearns, Beverly Peterson; Stearns, S. C.; Stearns, Stephen C. (2000). Watching, from the Edge of Extinction. Yale University Press (Q255147). p. preface x. ISBN 978-0-300-08469-6. Retrieved 30 May 2017.
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  150. ↑ Newman, Mark. A model of mass extinction. 1997. Journal of Theoretical Biology 189: 235–252
  151. ↑ "CAS REGISTRY Keeps Pace with Rapid Growth of Chemical Research, Registers 60 Millionth Substance".
  152. ↑ Measuring Diagnoses: ICD Code Accuracy
  153. ↑ "How many drug targets are there?". 1,357 unique drugs: 1,204 are 'small-molecule drugs' and 166 are 'biological' drugs
  154. ↑ Approximate number of entries in the On-Line Encyclopedia of Integer Sequences
  155. ↑ Biographies by gender in Wikidata
  156. ↑ "Worldometers - real time world statistics".
  157. ↑ How Many People Have Ever Lived on Earth? (Template:Webarchive)
  158. ↑ Occupations in Wikidata
  159. ↑ In 2005, it received 427,078 patent applications, 11,386 utility model applications, 39,254 design applications, and 125,807 trademark applications; it registered 122,944 patents, 10,573 utility model rights, 32,633 design rights, and 97,939 trademark rights in the same year.
  160. ↑ "App Store's 25 Billionth Download Comes From China with 'Where's My Water? Free'". MacRumors. Archived from the original on 2012-06-06.
  161. ↑ "Google Play About To Pass 15 Billion App Downloads? Pssht! It Did That Weeks Ago". TechCrunch (Q1022366). 7 May 2012. Archived from the original on 2012-06-06. Retrieved 22 May 2012.
  162. ↑ "The World Factbook — COUNTRY COMPARISON :: ROADWAYS". www.cia.gov. Retrieved 2017-08-23. Cite has empty unknown parameter: |dead-url= (help)
  163. ↑ SIC 1622: BRIDGE, TUNNEL, AND ELEVATED HIGHWAY CONSTRUCTION - Of the more than 600,000 bridges in the United States, 45 percent are under the financial jurisdiction of state governments, and 38 percent are controlled by county authorities.
  164. ↑ IMDB stats
  165. ↑ SIMBAD

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