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The World Portal
The world is the totality of entities, the whole of reality, or everything that exists. The nature of the world has been conceptualized differently in different fields. Some conceptions see the world as unique while others talk of a "plurality of worlds". Some treat the world as one simple object while others analyze the world as a complex made up of parts.
In scientific cosmology, the world or universe is commonly defined as "[t]he totality of all space and time; all that is, has been, and will be". Theories of modality talk of possible worlds as complete and consistent ways how things could have been. Phenomenology, starting from the horizon of co-given objects present in the periphery of every experience, defines the world as the biggest horizon or the "horizon of all horizons". In philosophy of mind, the world is contrasted with the mind as that which is represented by the mind. Theology conceptualizes the world in relation to God, for example, as God's creation, as identical to God or as the two being interdependent. In religions, there is a tendency to downgrade the material or sensory world in favor of a spiritual world to be sought through religious practice. A comprehensive representation of the world and our place in it, as is found in religions, is known as a worldview. Cosmogony is the field that studies the origin or creation of the world while eschatology refers to the science or doctrine of the last things or of the end of the world.
In various contexts, the term "world" takes a more restricted meaning associated, for example, with the Earth and all life on it, with humanity as a whole or with an international or intercontinental scope. In this sense, world history refers to the history of humanity as a whole and world politics is the discipline of political science studying issues that transcend nations and continents. Other examples include terms such as "world religion", "world language", "world government", "world war", "world population", "world economy", or "world championship". (Full article...)
Selected articles - show another
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Image 1
The history of medicine is both a study of medicine throughout history as well as a multidisciplinary field of study that seeks to explore and understand medical practices, both past and present, throughout human societies.
The history of medicine is the study and documentation of the evolution of medical treatments, practices, and knowledge over time. Medical historians often draw from other humanities fields of study including economics, health sciences, sociology, and politics to better understand the institutions, practices, people, professions, and social systems that have shaped medicine. When a period which predates or lacks written sources regarding medicine, information is instead drawn from archaeological sources. This field tracks the evolution of human societies' approach to health, illness, and injury ranging from prehistory to the modern day, the events that shape these approaches, and their impact on populations. (Full article...) -
Image 2Global workforce refers to the international labor pool of workers, including those employed by multinational companies and connected through a global system of networking and production, foreign workers, transient migrant workers, remote workers, those in export-oriented employment, contingent workforce or other precarious work. As of 2012, the global labor pool consisted of approximately 3 billion workers, around 200 million unemployed. (Full article...)
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While the future cannot be predicted with certainty, present understanding in various scientific fields allows for the prediction of some far-future events, if only in the broadest outline. These fields include astrophysics, which studies how planets and stars form, interact, and die; particle physics, which has revealed how matter behaves at the smallest scales; evolutionary biology, which studies how life evolves over time; plate tectonics, which shows how continents shift over millennia; and sociology, which examines how human societies and cultures evolve.
These timelines begin at the start of the 4th millennium in 3001 CE, and continue until the furthest and most remote reaches of future time. They include alternative future events that address unresolved scientific questions, such as whether humans will become extinct, whether the Earth survives when the Sun expands to become a red giant and whether proton decay will be the eventual end of all matter in the Universe. (Full article...) -
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Several cosmological and mythological systems portray four corners of the world or four quarters of the world corresponding approximately to the four points of the compass (or the two solstices and two equinoxes). At the center may lie a sacred mountain, garden, world tree, or other beginning-point of creation. Often four rivers run to the four corners of the world, and water or irrigate the four quadrants of Earth. (Full article...) -
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The Holocene extinction, or Anthropocene extinction, is the ongoing extinction event caused by humans during the Holocene epoch. These extinctions span numerous families of plants and animals, including mammals, birds, reptiles, amphibians, fish, and invertebrates, and affecting not just terrestrial species but also large sectors of marine life. With widespread degradation of biodiversity hotspots, such as coral reefs and rainforests, as well as other areas, the vast majority of these extinctions are thought to be undocumented, as the species are undiscovered at the time of their extinction, which goes unrecorded. The current rate of extinction of species is estimated at 100 to 1,000 times higher than natural background extinction rates and is increasing. During the past 100–200 years, biodiversity loss and species extinction have accelerated, to the point that most conservation biologists now believe that human activity has either produced a period of mass extinction, or is on the cusp of doing so. As such, after the "Big Five" mass extinctions, the Holocene extinction event has also been referred to as the sixth mass extinction or sixth extinction; given the recent recognition of the Capitanian mass extinction, the term seventh mass extinction has also been proposed for the Holocene extinction event.
The Holocene extinction follows the extinction of the majority of large (megafaunal) animals during the preceding Late Pleistocene. Some of these extinctions were likely in part due to human hunting pressure. The most popular theory is that human overhunting of species added to existing stress conditions as the Holocene extinction coincides with human colonization of many new areas around the world. Although there is debate regarding how much human predation and habitat loss affected their decline, certain population declines have been directly correlated with the onset of human activity, such as the extinction events of New Zealand, Madagascar, and Hawaii. Aside from humans, climate change may have been a driving factor in the megafaunal extinctions, especially at the end of the Pleistocene. (Full article...) -
Image 6Post-Kyoto negotiations refers to high level talks attempting to address global warming by limiting greenhouse gas emissions. Generally part of the United Nations Framework Convention on Climate Change (UNFCCC), these talks concern the period after the first "commitment period" of the Kyoto Protocol, which expired at the end of 2012. Negotiations have been mandated by the adoption of the Bali Road Map and Decision 1/CP.13 ("The Bali Action Plan").
UNFCCC negotiations are conducted within two subsidiary bodies, the Ad Hoc Working Group on Long-term Cooperative Action under the Convention (AWG-LCA) and the Ad Hoc Working Group on Further Commitments for Annex I Parties under the Kyoto Protocol (AWG-KP) and were expected to culminate in the United Nations Climate Change Conference taking place in December 2009 in Copenhagen (COP-15); negotiations are supported by a number of external processes, including the G8 process, a number of regional meetings and the Major Economies Forum on Energy and Climate that was launched by US President Barack Obama in March 2009. High level talks were held at the meeting of the G8+5 Climate Change Dialogue in February 2007 and at a number of subsequent G8 meetings, most recently leading to the adoption of the G8 leaders declaration "Responsible Leadership for a Sustainable Future" during the G8 summit in L´Aquila, Italy, in July 2009. (Full article...) -
Image 7
The world economy or global economy is the economy of all humans in the world, referring to the global economic system, which includes all economic activities conducted both within and between nations, including production, consumption, economic management, work in general, financial transactions and trade of goods and services. In some contexts, the two terms are distinct: the "international" or "global economy" is measured separately and distinguished from national economies, while the "world economy" is simply an aggregate of the separate countries' measurements. Beyond the minimum standard concerning value in production, use and exchange, the definitions, representations, models and valuations of the world economy vary widely. It is inseparable from the geography and ecology of planet Earth.
It is common to limit questions of the world economy exclusively to human economic activity, and the world economy is typically judged in monetary terms, even in cases in which there is no efficient market to help valuate certain goods or services, or in cases in which a lack of independent research, genuine data or government cooperation makes calculating figures difficult. Typical examples are illegal drugs and other black market goods, which by any standard are a part of the world economy, but for which there is, by definition, no legal market of any kind. (Full article...)
General images - load new batch
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Image 2Great Pyramids of Giza, Egypt
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Image 3The replicator in virtually all known life is deoxyribonucleic acid. DNA is far more complex than the original replicator and its replication systems are highly elaborate. (from History of Earth)
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Image 4Artist's conception of Hadean Eon Earth, when it was much hotter and inhospitable to all forms of life. (from History of Earth)
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Image 5Empires of the world in 1898
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Image 6Tiktaalik, a fish with limb-like fins and a predecessor of tetrapods. Reconstruction from fossils about 375 million years old. (from History of Earth)
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Image 7Battle during the 1281 Mongol invasion of Japan
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Image 10Earth's western hemisphere showing topography relative to Earth's center instead of to mean sea level, as in common topographic maps (from Earth)
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Image 14A reconstruction of Pannotia (550 Ma). (from History of Earth)
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Image 16Trilobites first appeared during the Cambrian period and were among the most widespread and diverse groups of Paleozoic organisms. (from History of Earth)
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Image 17Yggdrasil, an attempt to reconstruct the Norse world tree which connects the heavens, the world, and the underworld. (from World)
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Image 19An artist's impression of ice age Earth at glacial maximum. (from History of Earth)
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Image 20Fall of the Berlin Wall, 1989
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Image 21A banded iron formation from the 3.15 Ga Moodies Group, Barberton Greenstone Belt, South Africa. Red layers represent the times when oxygen was available; gray layers were formed in anoxic circumstances. (from History of Earth)
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Image 22Earth's axial tilt causing different angles of seasonal illumination at different orbital positions around the Sun (from Earth)
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Image 24First airplane, the Wright Flyer, flew on 17 December 1903.
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Image 25Geologic map of North America, color-coded by age. From most recent to oldest, age is indicated by yellow, green, blue, and red. The reds and pinks indicate rock from the Archean.
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Image 27A computer-generated image mapping the prevalence of artificial satellites and space debris around Earth in geosynchronous and low Earth orbit (from Earth)
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Image 28Great Mosque of Kairouan, Tunisia, founded 670 CE
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Image 29An artist's impression of the Archean, the eon after Earth's formation, featuring round stromatolites, which are early oxygen-producing forms of life from billions of years ago. After the Late Heavy Bombardment, Earth's crust had cooled, its water-rich barren surface is marked by continents and volcanoes, with the Moon still orbiting Earth half as far as it is today, appearing 2.8 times larger and producing strong tides. (from Earth)
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Image 30A 580 million year old fossil of Spriggina floundensi, an animal from the Ediacaran period. Such life forms could have been ancestors to the many new forms that originated in the Cambrian Explosion. (from History of Earth)
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Image 31Change in average surface air temperature and drivers for that change. Human activity has caused increased temperatures, with natural forces adding some variability. (from Earth)
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Image 32Angkor Wat temple complex, Cambodia, early 12th century
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Image 34Notre-Dame de Paris, France
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Image 37Tracy Caldwell Dyson, a NASA astronaut, observing Earth from the Cupola module at the International Space Station on 11 September 2010 (from Earth)
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Image 39Standing Buddha from Gandhara, 2nd century CE
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Image 40A map of heat flow from Earth's interior to the surface of Earth's crust, mostly along the oceanic ridges (from Earth)
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Image 41Earth's land use for human agriculture in 2019 (from Earth)
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Image 42Pangaea was a supercontinent that existed from about 300 to 180 Ma. The outlines of the modern continents and other landmasses are indicated on this map. (from History of Earth)
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Image 47Last Moon landing: Apollo 17 (1972)
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Image 48A reconstruction of human history based on fossil data. (from History of Earth)
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Image 49Lithified stromatolites on the shores of Lake Thetis, Western Australia. Archean stromatolites are the first direct fossil traces of life on Earth. (from History of Earth)
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Image 50Peopling of the world, the Southern Dispersal scenario
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Image 51Astronaut Buzz Aldrin on the Moon, photographed by Neil Armstrong, 1969 (from History of Earth)
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Image 52A schematic view of Earth's magnetosphere with solar wind flowing from left to right (from Earth)
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Image 53Artist's rendition of an oxinated fully-frozen Snowball Earth with no remaining liquid surface water. (from History of Earth)
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Image 54Benin Bronze head from Nigeria
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Image 55Atomic bombing of Nagasaki, 1945
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Image 56A view of Earth with its global ocean and cloud cover, which dominate Earth's surface and hydrosphere; at Earth's polar regions, its hydrosphere forms larger areas of ice cover. (from Earth)
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Image 57Dinosaurs were the dominant terrestrial vertebrates throughout most of the Mesozoic (from History of Earth)
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Image 58An animation of the changing density of productive vegetation on land (low in brown; heavy in dark green) and phytoplankton at the ocean surface (low in purple; high in yellow) (from Earth)
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Image 59A view of Earth with different layers of its atmosphere visible: the troposphere with its clouds casting shadows, a band of stratospheric blue sky at the horizon, and a line of green airglow of the lower thermosphere around an altitude of 100 km, at the edge of space (from Earth)
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Image 61Graph showing range of estimated partial pressure of atmospheric oxygen through geologic time (from History of Earth)
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Image 62Earth's night-side upper atmosphere appearing from the bottom as bands of afterglow illuminating the troposphere in orange with silhouettes of clouds, and the stratosphere in white and blue. Next the mesosphere (pink area) extends to the orange and faintly green line of the lowest airglow, at about one hundred kilometers at the edge of space and the lower edge of the thermosphere (invisible). Continuing with green and red bands of aurorae stretching over several hundred kilometers. (from Earth)
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Image 64A composite image of Earth, with its different types of surface discernible: Earth's surface dominating Ocean (blue), Africa with lush (green) to dry (brown) land and Earth's polar ice in the form of Antarctic sea ice (grey) covering the Antarctic or Southern Ocean and the Antarctic ice sheet (white) covering Antarctica. (from Earth)
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Image 65Pale orange dot, an artist's impression of Early Earth, featuring its tinted orange methane-rich early atmosphere (from Earth)
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Image 67Olmec colossal head, now at the Museo de Antropología de Xalapa
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Image 68Chloroplasts in the cells of a moss (from History of Earth)
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Image 69Ajloun Castle, Jordan
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Image 70A 2012 artistic impression of the early Solar System's protoplanetary disk from which Earth and other Solar System bodies were formed (from Earth)
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Image 71Artist's impression of the enormous collision that probably formed the Moon (from History of Earth)
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Image 73The pale orange dot, an artist's impression of the early Earth which might have appeared orange through its hazy methane rich prebiotic second atmosphere. Earth's atmosphere at this stage was somewhat comparable to today's atmosphere of Titan. (from History of Earth)
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Image 74Artist's impression of Earth during the later Archean, the largely cooled planetary crust and water-rich barren surface, marked by volcanoes and continents, features already round microbialites. The Moon, still orbiting Earth much closer than today and still dominating Earth's sky, produced strong tides. (from History of Earth)
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Image 76Shanghai. China urbanized rapidly in the 21st century.
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Image 79Vitruvian Man by Leonardo da Vinci epitomizes the advances in art and science seen during the Renaissance. (from History of Earth)
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Image 80"Lucy", the first Australopithecus afarensis skeleton found, was only 1.06 m (3 ft 6 in) tall.
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Image 82A pillar at Göbekli Tepe
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Image 84Obelisk of Axum, Ethiopia
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Image 86Japanese depiction of a Portuguese carrack. European maritime innovations led to proto-globalization.
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Image 87Artist's impression of a Hadean landscape with the relatively newly formed Moon still looming closely over Earth and both bodies sustaining strong volcanism. (from History of Earth)
Megacities of the world - show another
Cairo (/ˈkaɪroʊ/ ⓘ KY-roh; Arabic: القاهرة, romanized: al-Qāhirah) is the capital of Egypt and the city-state Cairo Governorate, and is the country's largest city, being home to more than 10 million people. It is also part of the largest urban agglomeration in Africa, the Arab world and the Middle East, the Greater Cairo metropolitan area, which is the 12th-largest in the world by population with a population of over 22.1 million.
Cairo is associated with ancient Egypt, as the Giza pyramid complex and the ancient cities of Memphis and Heliopolis are located in its geographical area. Located near the Nile Delta, the city first developed as Fustat following the Muslim conquest of Egypt in 641 next to an existing ancient Roman fortress, Babylon. Cairo was founded by the Fatimid dynasty in 969. It later superseded Fustat as the main urban centre during the Ayyubid and Mamluk periods (12th–16th centuries). Cairo has long been a centre of the region's political and cultural life, and is titled "the city of a thousand minarets" for its preponderance of Islamic architecture. Cairo's historic center was awarded World Heritage Site status in 1979. Cairo is considered a World City with a "Beta +" classification according to GaWC. (Full article...)Did you know - load new batch
- ... that a Stone Age Siberian village is the oldest known fortification in the world?
- ... that Kuappi in Iisalmi, Finland, holds the Guinness world record for the smallest restaurant?
- ... that the 2026 FIFA World Cup final will be hosted by a stadium that is cutting corners?
- ... that an observer once described a play-by-mail game as "the most complex game system on Earth"?
- ... that Jasson Domínguez is nicknamed "The Martian" because his talent is said to be not of this world?
- ... that Iris Murdoch wrote a poem juxtaposing the outbreak of World War II with a seminar by Eduard Fraenkel?
- ... that the final of the 2009 IBSF women's snooker championship was interrupted so that drug tests could be conducted on the players?
- ... that Charlize Mörz became the first Austrian female gymnast to win a gold medal in the FIG World Cup series in 2024?
Countries of the world - show another
Mongolia is a landlocked country in East Asia, bordered by Russia to the north and China to the south. It covers an area of 1,564,116 square kilometres (603,909 square miles), with a population of just 3.3 million, making it the world's most sparsely populated sovereign state. Mongolia is the world's largest landlocked country that does not border a closed sea, and much of its area is covered by grassy steppe, with mountains to the north and west and the Gobi Desert to the south. Ulaanbaatar, the capital and largest city, is home to roughly half of the country's population.
The territory of modern-day Mongolia has been ruled by various nomadic empires, including the Xiongnu, the Xianbei, the Rouran, the First Turkic Khaganate, the Second Turkic Khaganate, the Uyghur Khaganate and others. In 1206, Genghis Khan founded the Mongol Empire, which became the largest contiguous land empire in history. His grandson Kublai Khan conquered China proper and established the Yuan dynasty. After the collapse of the Yuan, the Mongols retreated to Mongolia and resumed their earlier pattern of factional conflict, except during the era of Dayan Khan and Tumen Zasagt Khan. In the 16th century, Tibetan Buddhism spread to Mongolia, being further led by the Manchu-founded Qing dynasty, which absorbed the country in the 17th century. By the early 20th century, almost one-third of the adult male population were Buddhist monks. After the collapse of the Qing dynasty in 1911, Mongolia declared independence, and achieved actual independence from the Republic of China in 1921. Shortly thereafter, the country became a satellite state of the Soviet Union. In 1924, the Mongolian People's Republic was founded as a socialist state. After the anti-communist revolutions of 1989, Mongolia conducted its own peaceful democratic revolution in early 1990. This led to a multi-party system, a new constitution of 1992, and transition to a market economy. (Full article...)Related portals
Protected areas of the world - load new batch
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Image 1
There are currently 225 Protected Natural Areas in Mexico, covering 93.8 million hectares in total. They are protected and administered by the National Commission of Protected Natural Areas (Comisión Nacional de Áreas Naturales Protegidas, or 'CONANP'), a federal agency. CONANP administers:- 77 Mexican National Parks
- 48 biosphere reserves
- 54 flora and fauna protection areas
- 28 Mexican Nature Sanctuaries
- 13 natural resources protection areas
- 5 natural monuments
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Image 2This is a list of protected areas of Sierra Leone, including national parks, game reserves, conservation areas, wetlands, and those that are listed as proposed protected areas in the UN Environment Programme World Conservation Monitoring Centre (UNEP WCM) database. (Full article...)
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Image 3Protected areas of Sri Lanka are administrated by Department of Forest Conservation and Department of Wildlife Conservation of Sri Lanka.There are 501 protected areas in Sri Lanka. The protected areas that fall under supervision of the Department of Forest Conservation include forests defined in National Heritage Wilderness Area Act in 1988, forest reservations, and forests managed for sustainability. Sinharaja Forest Reserve is an example for a National Heritage forest (it is also a World Heritage Site). There are 32 forests categorized as conservation forests including Knuckles Mountain Range. Strict nature reserves, national parks, nature reserves, forest corridors, and sanctuaries recognized under the Flora and Fauna Protection Ordinance are managed by Department of Wildlife Conservation. Total of all protected areas is 1,767,000 ha. Protected areas in Sri Lanka account for 26.5 percent of the total area. This is a higher percentage of protected areas than in all of Asia and much of the World. (Full article...)
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Image 4Protected areas of Australia include Commonwealth and off-shore protected areas managed by the Australian government, as well as protected areas within each of the six states of Australia and two self-governing territories, the Australian Capital Territory and the Northern Territory, which are managed by the eight state and territory governments.
Commonwealth and off-shore protected areas in the Australian Capital Territory, the Northern Territory, the Christmas Island Territory, the Cocos (Keeling) Islands Territory, the Norfolk Island Territory and the Australian Antarctic Territory are managed by Director of National Parks, an agency within the Department of the Environment and Energy, with the exception of the Great Barrier Reef Marine Park, which is managed by the Great Barrier Reef Marine Park Authority, a separate body within the department. (Full article...) -
Image 5Cadw is the historic environment service of the Welsh Government which manages historical buildings and ancient monuments in Wales. (Full article...)
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Image 6A list of protected areas of Oman:
- Al Wusta Wildlife Reserve
- Ra's Al Hadd Turtle Reserve
- Ad Dimaniyat Islands Reserve
- Al Saleel National Park (As Salil Natural Park)
- Jabal Samhan Nature Reserve
- Al Jabal Al Akhdar Scenic Reserve
- Western Hajer Stars Lights Reserve
- Arabian Oryx Sanctuary
- Al Rustaq Wildlife Reserve
- Al Wusta Wetland Reserve
- Jabal Qahwan Nature Reserve
- Al Sareen Nature Reserve
- Ras al Shajar Nature Reserve
- Al Khuwuair Nature Reserve
- Khawrs of the Salalah Coast Reserve
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Image 7This is a list of protected areas of Cambodia.
A total of 8 forms of protected area are recognized under the Cambodian Protected Area Law of 2008. These are: (Full article...) -
Image 8
This is a list of some protected areas of Samoa which include national parks, reservations, protected nature zones, marine reserves and other areas of significant biodiversity and conservation.
In 1994, Samoa ratified the international and legally binding treaty, the Convention on Biological Diversity to develop national strategies for conservation and sustainable use of biological diversity. In 2010, protected areas in the country cover 5% of land although the government aims to increase protected areas coverage to 15%. (Full article...) -
Image 9This is a list of protected areas of Ontario that are administered by Government of Ontario. Ontario Parks and the Ministry of the Environment, Conservation and Parks are the provincial bodies responsible for managing these protected areas. (Full article...)
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Image 10Illinois has a variety of protected areas, including over 123 state-protected areas, dozens of federally protected areas, hundreds of county-level and municipal park areas. Illinois also contains sites designated as internationally important protected areas. These multiple levels of protection contribute to a statewide network of numerous recreation opportunities and conservation schemes, sometimes in a small area. For example, DeKalb County contains a 1,000-acre (4.0 km2) forest preserve system and a 1,500-acre (6.1 km2) state park (Shabbona Lake State Park); within DeKalb County, the DeKalb Park District in the City of DeKalb has a 700-acre (2.8 km2) park system. (Full article...)
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Image 11The state of Johor in Malaysia is noted for its national parks and forest reserves which preserve virgin rainforests known for its biodiversity and endangered species of animals.
Mangrove swamps and coral reefs are also protected within these parks. (Full article...) -
Image 12
The protected areas of Bhutan are its national parks, nature preserves, and wildlife sanctuaries. Most of these protected areas were first set aside in the 1960s, originally covering most of the northern and southern regions of Bhutan. Today, protected areas cover more than 42% of the kingdom, mostly in the northern regions. Protected areas also line most of Bhutan's international borders with China and India. (Full article...) -
Image 13
The Gujarat state of western India has four National Parks and twenty-three wildlife sanctuaries which are managed by the Forest Department of the Government of Gujarat. (Full article...) -
Image 14
There are several types of protected areas of the Czech Republic. The main form of landscape protection is delimitation of special protected areas. All the types of protected areas are determined by law. (Full article...) -
Image 15
The protected areas of the Northern Territory consists of protected areas managed by the governments of the Northern Territory and Australia and private organisations with a reported total area of 335,527 square kilometres (129,548 sq mi) being 24.8% of the total area of the Northern Territory of Australia. (Full article...)
Selected world maps
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Image 1Only a few of the largest large igneous provinces appear (coloured dark purple) on this geological map, which depicts crustal geologic provinces as seen in seismic refraction data
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Image 2The Goode homolosine projection is a pseudocylindrical, equal-area, composite map projection used for world maps.
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Image 3A plate tectonics map with volcano locations indicated with red circles
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Image 4United Nations Human Development Index map by country (2016)
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Image 5Mollweide projection of the world
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Image 61516 map of the world by Martin Waldseemüller
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Image 7The world map by Gerardus Mercator (1569), the first map in the well-known Mercator projection
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Image 8Index map from the International Map of the World (1:1,000,000 scale)
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Image 9Time zones of the world
World records
- List of Olympic records in athletics
- List of world records in athletics
- List of junior world records in athletics
- List of world records in masters athletics
- List of world youth bests in athletics
- List of IPC world records in athletics
- List of world records in canoeing
- List of world records in chess
- List of cycling records
- List of world records in track cycling
- List of world records in finswimming
- List of world records in juggling
- List of world records in rowing
- List of world records in speed skating
- List of world records in swimming
- List of IPC world records in swimming
- List of world records in Olympic weightlifting
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