The Blue Marble, a photograph of the planet Earth made on 7 December 1972 by the crew of the Apollo 17 spacecraft.
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...)
The Special Report on Global Warming of 1.5°C (SR15) was published by the Intergovernmental Panel on Climate Change (IPCC) on 8 October 2018. The report, approved in Incheon, South Korea, includes over 6,000 scientific references, and was prepared by 91 authors from 40 countries. In December 2015, the 2015 United Nations Climate Change Conference called for the report. The report was delivered at the United Nations' 48th session of the IPCC to "deliver the authoritative, scientific guide for governments" to deal with climate change. Its key finding is that meeting a 1.5 °C (2.7 °F) target is possible but would require "deep emissions reductions" and "rapid, far-reaching and unprecedented changes in all aspects of society". Furthermore, the report finds that "limiting global warming to 1.5 °C compared with 2 °C would reduce challenging impacts on ecosystems, human health and well-being" and that a 2 °C temperature increase would exacerbate extreme weather, rising sea levels and diminishing Arctic sea ice, coral bleaching, and loss of ecosystems, among other impacts.
SR15 also has modelling that shows that, for global warming to be limited to 1.5 °C, "Global net human-caused emissions of carbon dioxide (CO2) would need to fall by about 45 percent from 2010 levels by 2030, reaching 'net zero' around 2050." The reduction of emissions by 2030 and its associated changes and challenges, including rapid decarbonisation, was a key focus on much of the reporting which was repeated through the world. (Full article...)
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The World Trade Organization (WTO) is an intergovernmental organization headquartered in Geneva, Switzerland that regulates and facilitates international trade. Governments use the organization to establish, revise, and enforce the rules that govern international trade in cooperation with the United Nations System. The WTO is the world's largest international economic organization, with 164 member states representing over 98% of global trade and global GDP.
The WTO facilitates trade in goods, services and intellectual property among participating countries by providing a framework for negotiating trade agreements, which usually aim to reduce or eliminate tariffs, quotas, and other restrictions; these agreements are signed by representatives of member governments and ratified by their legislatures. It also administers independent dispute resolution for enforcing participants' adherence to trade agreements and resolving trade-related disputes. The organization prohibits discrimination between trading partners, but provides exceptions for environmental protection, national security, and other important goals. (Full article...)
A treaty may also be known as an international agreement, protocol, covenant, convention, pact, or exchange of letters, among other terms. However, only documents that are legally binding on the parties are considered treaties under international law. Treaties vary in their obligations (the extent to which states are bound to the rules), precision (the extent to which the rules are unambiguous), and delegation (the extent to which third parties have authority to interpret, apply and make rules). (Full article...)
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World Englishes is a term for emerging localised or indigenised varieties of English, especially varieties that have developed in territories influenced by the United Kingdom or the United States. The study of World Englishes consists of identifying varieties of English used in diverse sociolinguistic contexts globally and analyzing how sociolinguistic histories, multicultural backgrounds and contexts of function influence the use of English in different regions of the world.
The issue of World Englishes was first raised in 1978 to examine concepts of regional Englishes globally. Pragmatic factors such as appropriateness, comprehensibility and interpretability justified the use of English as an international and intra-national language. In 1988, at a Teachers of English to Speakers of Other Languages (TESOL) conference in Honolulu, Hawaii, the International Committee of the Study of World Englishes (ICWE) was formed. In 1992, the ICWE formally launched the International Association for World Englishes (IAWE) at a conference of "World Englishes Today", at the University of Illinois, USA. There are two academic journals devoted to the study of this topic, titled English World-Wide (since 1980) and World Englishes (since 1982). There are a number of published handbooks and textbooks on the subject. (Full article...)
Although not in a single voyage but Magellan was technically the first to circumnavigate the globe since he was killed in the Mactan Islands and while in the Kingdom of Portugal's service, Magellan had already reached the Malay Archipelago in Southeast Asia on previous voyages traveling east (from 1505 to 1511–1512). By visiting this area again but now traveling west, Magellan achieved a nearly complete personal circumnavigation of the globe for the first time in history. (Full article...)
The following are images from various world-related articles on Wikipedia.
Image 1A 2012 artistic impression of the early Solar System's protoplanetary disk from which Earth and other Solar System bodies were formed (from Earth)
Image 15First airplane, the Wright Flyer, flew on 17 December 1903.
Image 16A schematic view of Earth's magnetosphere with solar wind flowing from left to right (from Earth)
Image 17The 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)
Image 18An 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)
Image 19Earth's history with time-spans of the eons to scale (from History of Earth)
Image 21Earth'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 streching over several hundred kilometers. (from Earth)
Image 26Pangaea 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)
Image 27A High Desert storm, sweeps across the Mojave (from Earth)
Image 30Geologic 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.
Image 31Conjectured illustration of the scorched Earth after the Sun has entered the red giant phase, about 5–7 billion years from now (from Earth)
Image 37A 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)
Image 44Artist'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)
Image 45A reconstruction of human history based on fossil data. (from History of Earth)
Image 48Trilobites first appeared during the Cambrian period and were among the most widespread and diverse groups of Paleozoic organisms. (from History of Earth)
Image 49An 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)
Image 50Tiktaalik, a fish with limb-like fins and a predecessor of tetrapods. Reconstruction from fossils about 375 million years old. (from History of Earth)
Image 59Earth's western hemisphere showing topography relative to Earth's center instead of to mean sea level, as in common topographic maps (from Earth)
Image 61Map of peopling of the world (Southern Dispersal paradigm), in thousands of years ago.
Image 62Artist'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 roundmicrobialites. The Moon, still orbiting Earth much closer than today and still dominating Earth's sky, produced strong tides. (from History of Earth)
Image 63The Pantheon, originally a Roman temple, now a Catholic church
Image 70Earth's axial tilt causing different angles of seasonal illumination at different orbital positions around the Sun (from Earth)
Image 71Exaggerated illustration of Earth's elliptical orbit around the Sun, marking that the orbital extreme points (apoapsis and periapsis) are not the same as the four seasonal extreme points, the equinox and solstice (from Earth)
Image 86Change in average surface air temperature and drivers for that change. Human activity has caused increased temperatures, with natural forces adding some variability. (from Earth)
Image 87Artist's rendition of an oxinated fully-frozen Snowball Earth with no remaining liquid surface water. (from History of Earth)
Hangzhou is the capital and most populous city of Zhejiang, China. It is located in the northeastern part of the province, sitting at the head of Hangzhou Bay, which separates Shanghai and Ningbo. Hangzhou grew to prominence as the southern terminus of the Grand Canal and has been one of China's most renowned and prosperous cities for much of the last millennium. It is a major economic and e-commerce hub within China, and the second biggest city in the Yangtze Delta after Shanghai. Hangzhou is classified as a sub-provincial city and forms the core of the Hangzhou metropolitan area, the fourth-largest in China after Guangzhou-Shenzhen Pearl River agglomeration, Shanghai-Suzhou-Wuxi-Changzhou conurbation and Beijing. As of 2022, the Hangzhou metropolitan area was estimated to produce a gross metropolitan product (nominal) of 4 trillion yuan (US$590 billion), making it larger than the economy of Sweden. As of the 2020 Chinese census, it had a total population of 11,936,010 inhabitants. However, its metropolitan area, populated by 13.035 million people over an area of 8,107.9 km2 (3,130.5 sq mi), consists of all urban districts in Hangzhou and 3 urban districts of the city of Shaoxing.
Hangzhou has been repeatedly rated as the best commercial city in mainland China by Forbes and the Chinese city with the highest growth potential by the Economist Intelligence Unit. A study conducted by PwC and China Development Research Foundation ranked Hangzhou first among "Chinese Cities of Opportunity". According to the Globalization and World Cities Research Network (GaWC), the city is classified as a Beta (global second-tier) city, together with Chongqing, Nanjing and Tianjin in China. Hangzhou is also one of the world's top 100 financial centers, according to the Global Financial Centres Index. It boasts the eighth largest GDP among cities in mainland China with a GDP of around 1.8 trillion RMB ($280 billion). Home to the headquarters of large global tech companies such as Alibaba Group, Ant Group, and NetEase, Hangzhou is known for attracting professionals and entrepreneurs who work in information technology. , Hangzhou has the tenth-most Fortune Global 500 headquarters of any city in the world and the fourth-most in China – after Beijing, Shanghai and Shenzhen – within its city limits. According to the 2020 Hurun Global Rich List, Hangzhou ranks 11th in the world and 6th in China (after Beijing, Shanghai, Hong Kong, Shenzhen and Guangzhou) in the number of resident billionaires. (Full article...)
The Seven Wonders of Wales (Welsh: Saith Rhyfeddod Cymru) is a traditional list of notable landmarks in north Wales, commemorated in an anonymously written rhyme:
The rhyme is usually supposed to have been written sometime in the late 18th or early 19th century by an English visitor to North Wales. The specific number of wonders may have varied over the years: the antiquary Daines Barrington, in a letter written in 1770, refers to Llangollen Bridge as one of the "five wonders of Wales, though like the seven wonders of Dauphiny, they turn out to be no wonders at all out of the Principality". (Full article...)
Papua New Guinea is home to several protected areas, which receive protection because of their environmental, cultural or similar value.
The total area of Papua New Guinea protected territories is 14,330 km2 (5,530 sq mi), which amounts to approximately 3.07% of the country's territory. The total number of protected areas as 2018 is 71. (Full article...)
A National Biodiversity Conservation Area (NBCA) is an environmentally protected area in Laos. There are all together 21 different NBCAs in Laos, protecting 29,775 square kilometers. Another 10 NBCAs have been proposed, many of them being treated by authorities as though they were already officially protected. (Full article...)
The headquarters of the National Parks Service are in downtown Buenos Aires, on Santa Fe Avenue. A library and information centre are open to the public. The administration also covers the national monuments, such as the Jaramillo Petrified Forest, and natural and educational reserves. (Full article...)
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The Protected areas of Portugal (Portuguese: Áreas protegidas de Portugal) are classified under a legal protection statute that allows for the adequate protection and maintenance of biodiversity, while providing services for ecosystem that maintains the natural and geological patrimony. (Full article...)
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Forests in the state of Himachal Pradesh (northern India) currently cover an area of nearly 37,939 square kilometres (14,648 sq mi), which is about 68.16% of the total land area of the state. The forests were once considered to be the main source of income of the state and most of the original forests were clear felled. The emphasis has shifted, however, from exploitation to conservation. The state government aims to increase forest cover to 50% of the total land area. There have been various projects, including the establishment of protected areas such as National Parks, designed to preserve and expand the forests. (Full article...)
The Protected areas of Kyrgyzstan are regulated by the law on specially protected natural areas of 2 May 2011, last modified on 2 June 2018. In total, they cover 14,761.216 km2 (5,699.337 sq mi) and account for 7.38% of the country's total area (as of 2017). The first protected area in Kyrgyzstan (Issyk-Kul) was established in 1948. According to the Government Decree on Priorities of Conservation of Biological Diversity and the relevant Action Plan for 2014-2024 the target area for the protected areas in Kyrgyzstan is 10 percent of the country’s area by 2024.
The protected areas are subdivided into seven categories: (Full article...)
National parks of Victoria State parks of Victoria Marine national parks of Victoria Marine and coastal parks of Victoria Marine sanctuaries of Victoria Other parks of Victoria
Greece is characterized by an extremely fragmented, rugged landscape hosting a great diversity of ecosystems and an outstanding biodiversity. Almost 5% of its extensive coastline consists of ecologically sensitivewetlands. Two thirds of the total population live no further than 2 km from the coast and most of the important urban centers are coastal, while almost all of the tourist infrastructure is divided among islands and the coastal mainland. (Full article...)
Image 5Only 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
ka = kiloannum (thousands years ago); Ma = megaannum (millions years ago); Ga = gigaannum (billions years ago). See also:Geologic time scale • Geology portal • World portal
The Special Report on Global Warming of 1.5 °C (SR15) was published by the Intergovernmental Panel on Climate Change (IPCC) on 8 October 2018. The report, approved in Incheon, South Korea, includes over 6,000 scientific references, and was prepared by 91 authors from 40 countries. In December 2015, the 2015 United Nations Climate Change Conference called for the report. The report was delivered at the United Nations' 48th session of the IPCC to "deliver the authoritative, scientific guide for governments" to deal with climate change. Its key finding is that meeting a 1.5 °C (2.7 °F) target is possible but would require "deep emissions reductions" and "rapid, far-reaching and unprecedented changes in all aspects of society". Furthermore, the report finds that "limiting global warming to 1.5 °C compared with 2 °C would reduce challenging impacts on ecosystems, human health and well-being" and that a 2 °C temperature increase would exacerbate extreme weather, rising sea levels and diminishing Arctic sea ice, coral bleaching, and loss of ecosystems, among other impacts.
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Earth's land use for human agriculture (from Earth)
Graph showing range of estimated partial pressure of atmospheric oxygen through geologic time (from History of Earth)
Cross-section through a liposome (from History of Earth)
A schematic view of Earth's magnetosphere with solar wind flowing from left to right (from Earth)
The 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)
An 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)
Earth's history with time-spans of the eons to scale (from History of Earth)
Pangaea 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)
A 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)
Artist'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)
A reconstruction of human history based on fossil data. (from History of Earth)
Empires of the world in 1898
An 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)
Satellite time lapse imagery of Earth's rotation showing axis tilt (from Earth)
Chloroplasts in the cells of a moss (from History of Earth)
Standing Buddha from Gandhara, 2nd century CE
Map of peopling of the world (Southern Dispersal paradigm), in thousands of years ago.
Earth's axial tilt causing different angles of seasonal illumination at different orbital positions around the Sun (from Earth)
Change 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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National parks of Victoria 
State parks of Victoria 
Marine national parks of Victoria 
Marine and coastal parks of Victoria 
Marine sanctuaries of Victoria 
Other parks of Victoria
A plate tectonics map with volcano locations indicated with red circles
United Nations Human Development Index map by country (2016)
The world map by Gerardus Mercator (1569), the first map in the well-known Mercator projection
Time zones of the world
Geology portal • 
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