A 501(c)(3) organization is a United States corporation, trust , unincorporated association or other type of organization exempt from federal income tax under section 501(c)(3) of Title 26 of the United States Code . It is one of the 29 types of 501(c) nonprofit organizations in the US.
134-401: The American Geophysical Union ( AGU ) is a 501(c)(3) nonprofit organization of Earth, atmospheric , ocean , hydrologic , space , and planetary scientists and enthusiasts that according to their website includes 130,000 people (not members). AGU's activities are focused on the organization and dissemination of scientific information in the interdisciplinary and international fields within
268-471: A jigsaw puzzle . Rocks normally form relatively horizontal layers, with each layer younger than the one underneath it. If a fossil is found between two layers whose ages are known, the fossil's age must lie between the two known ages. Because rock sequences are not continuous, but may be broken up by faults or periods of erosion , it is very difficult to match up rock beds that are not directly next to one another. However, fossils of species that survived for
402-545: A safe harbor for the "substantial part" test, the United States Congress enacted §501(h), called the Conable election after its author, Representative Barber Conable . The section establishes limits based on operating budget that a charity can use to determine if it meets the substantial test. This changes the prohibition against direct intervention in partisan contests only for lobbying. The organization
536-509: A candidate in some manner, or (c) favor a candidate or group of candidates, constitute prohibited participation or intervention. Since section 501(c)(3)'s political-activity prohibition was enacted, "commentators and litigants have challenged the provision on numerous constitutional grounds", such as freedom of speech , vagueness , and equal protection and selective prosecution. Historically, Supreme Court decisions, such as Regan v. Taxation with Representation of Washington , suggested that
670-452: A chief digital officer. The AGU offers several awards, medals and fellowships. AGU nominates members for fellowship in the society. According to the AGU website "To be elected a Fellow of AGU is a special tribute for those who have made exceptional scientific contributions to Earth and space sciences as valued by their peers and vetted by section and focus group committees." A maximum of 0.1% of
804-595: A choice between two sets of rules establishing an upper bound for their lobbying activities. Section 501(c)(3) organizations risk loss of their tax-exempt status if these rules are violated. An organization that loses its 501(c)(3) status due to being engaged in political activities cannot subsequently qualify for 501(c)(3) status. Churches must meet specific requirements to obtain and maintain tax-exempt status; these are outlined in "IRS Publication 1828: Tax Guide for Churches and Religious Organizations". This guide outlines activities allowed and not allowed by churches under
938-544: A church's principal means of accomplishing its religious purposes must be to assemble regularly a group of individuals related by common worship and faith." The United States Tax Court has stated that, while a church can certainly broadcast its religious services by radio, radio broadcasts themselves do not constitute a congregation unless there is a group of people physically attending those religious services. A church can conduct worship services in various specific locations rather than in one official location. A church may have
1072-552: A collision that formed the Moon about 40 million years later, may have cooled quickly enough to have oceans and an atmosphere about 4,440 million years ago . There is evidence on the Moon of a Late Heavy Bombardment by asteroids from 4,000 to 3,800 million years ago . If, as seems likely, such a bombardment struck Earth at the same time, the first atmosphere and oceans may have been stripped away. Paleontology traces
1206-602: A common ancestor. Ideally the "family tree" has only two branches leading from each node ("junction"), but sometimes there is too little information to achieve this, and paleontologists have to make do with junctions that have several branches. The cladistic technique is sometimes fallible, as some features, such as wings or camera eyes , evolved more than once, convergently – this must be taken into account in analyses. Evolutionary developmental biology , commonly abbreviated to "Evo Devo", also helps paleontologists to produce "family trees", and understand fossils. For example,
1340-469: A consequence of fossil fuel combustion and other human activities. These elevated concentrations of greenhouse gases are predicted to persist in the atmosphere for times ranging to thousands of years. Increasing concentrations of carbon dioxide and other greenhouse gases affect the Earth-atmosphere energy balance, enhancing the natural greenhouse effect and thereby exerting a warming influence at
1474-456: A constant rate. These " molecular clocks ", however, are fallible, and provide only a very approximate timing: for example, they are not sufficiently precise and reliable for estimating when the groups that feature in the Cambrian explosion first evolved, and estimates produced by different techniques may vary by a factor of two. Earth formed about 4,570 million years ago and, after
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#17327649352961608-403: A data source that is not limited to animals with easily fossilised hard parts, and they reflect organisms' behaviours. Also many traces date from significantly earlier than the body fossils of animals that are thought to have been capable of making them. Whilst exact assignment of trace fossils to their makers is generally impossible, traces may for example provide the earliest physical evidence of
1742-411: A foreign subsidiary to facilitate charitable work in a foreign country, then donors' contributions to the 501(c)(3) organization are tax-deductible even if intended to fund the foreign charitable activities. If a foreign organization sets up a 501(c)(3) organization for the sole purpose of raising funds for the foreign organization, and the 501(c)(3) organization sends substantially all contributions to
1876-573: A fortunate accident during other research. For example, the 1980 discovery by Luis and Walter Alvarez of iridium , a mainly extraterrestrial metal, in the Cretaceous – Paleogene boundary layer made asteroid impact the most favored explanation for the Cretaceous–Paleogene extinction event – although debate continues about the contribution of volcanism. A complementary approach to developing scientific knowledge, experimental science ,
2010-800: A four-digit article number. In 2012 the journals and books, including over one and a half million pages of legacy content, were transferred to the Wiley Online Library . John Wiley & Sons were recognized for this work with the IT Project Team of the Year Award at the UK IT Industry Awards for 2013. Five AGU journals are open access only: AGU Advances , Earth’s Future , Earth and Space Science , GeoHealth , JAMES , and Space Weather . The remainder are delayed open access journals , having free access after
2144-412: A full transition to electronic publishing in 2001. For all its journals, the electronic version became the publication of record. This was accompanied by a new identification scheme for articles that entirely did away with sequential page numbers. Instead, each article had a digital object identifier (DOI). As an example, 10.1029/2001GL014304 consists of the publisher identifier (10.1029), the year (2001),
2278-424: A full-time professional administrator. The post was renamed Executive Secretary and Waldo E. Smith was hired. He served until 1970 and then Athelstan Spilhaus, Jr. was hired as executive director. Christine McEntee replaced him in 2010. Medals have been named after Fleming and Smith. The AGU leadership in 2021 included, in addition to the president, a CEO, 4 executive vice presidents, 6 vice presidents, 7 directors, and
2412-410: A letter signed by 100 scientists was delivered to the AGU, requesting that they cut all ties with ExxonMobil and other companies that foster climate misinformation. The AGU Board of Directors met on April 22, 2016, and voted to continue accepting sponsorship from ExxonMobil, arguing that there was not unequivocal evidence that ExxonMobil continues to participate in climate misinformation. Instead of making
2546-444: A limited amount of lobbying to influence legislation. Although the law states that "no substantial part" of a public charity's activities can go to lobbying, charities with large budgets may lawfully expend a million dollars (under the "expenditure" test) or more (under the "substantial part" test) per year on lobbying. The Internal Revenue Service has never defined the term "substantial part" with respect to lobbying. To establish
2680-783: A manner consistent with a particular religion's religious beliefs does not qualify as a tax-exempt church. Organizations described in section 501(c)(3) are prohibited from conducting political campaign activities to intervene in elections to public office. The Internal Revenue Service website elaborates on this prohibition: Under the Internal Revenue Code, all section 501(c)(3) organizations are absolutely prohibited from directly or indirectly participating in, or intervening in, any political campaign on behalf of (or in opposition to) any candidate for elective public office. Contributions to political campaign funds or public statements of position (verbal or written) made on behalf of
2814-821: A minor group until the first jawed fish appeared in the Late Ordovician . The spread of animals and plants from water to land required organisms to solve several problems, including protection against drying out and supporting themselves against gravity . The earliest evidence of land plants and land invertebrates date back to about 476 million years ago and 490 million years ago respectively. Those invertebrates, as indicated by their trace and body fossils, were shown to be arthropods known as euthycarcinoids . The lineage that produced land vertebrates evolved later but very rapidly between 370 million years ago and 360 million years ago ; recent discoveries have overturned earlier ideas about
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#17327649352962948-467: A non-partisan manner do not constitute prohibited political campaign activity. In addition, other activities intended to encourage people to participate in the electoral process, such as voter registration and get-out-the-vote drives, would not be prohibited political campaign activity if conducted in a non-partisan manner. On the other hand, voter education or registration activities with evidence of bias that (a) favor one candidate over another, (b) oppose
3082-408: A plenary session of the annual Fall Meeting with a call for scientists to engage in protest against climate change. AGU removed their research presentations from the meeting, banned them from participation, launched a misconduct inquiry, and complained to Abramoff's employer, Oak Ridge National Laboratory . Kalmus and Abramoff further claimed that AGU threatened to have them arrested if they returned to
3216-555: A rapid increase in knowledge about the history of life on Earth and to progress in the definition of the geologic time scale , largely based on fossil evidence. Although she was rarely recognised by the scientific community, Mary Anning was a significant contributor to the field of palaeontology during this period; she uncovered multiple novel Mesozoic reptile fossils and deducted that what were then known as bezoar stones are in fact fossilised faeces . In 1822 Henri Marie Ducrotay de Blainville , editor of Journal de Physique , coined
3350-543: A relatively short time can be used to link up isolated rocks: this technique is called biostratigraphy . For instance, the conodont Eoplacognathus pseudoplanus has a short range in the Middle Ordovician period. If rocks of unknown age are found to have traces of E. pseudoplanus , they must have a mid-Ordovician age. Such index fossils must be distinctive, be globally distributed and have a short time range to be useful. However, misleading results are produced if
3484-1017: A result of a 2016 workshop AGU convened to address the challenge of sexual and gender-based harassment, with co-sponsorship by the American Association for the Advancement of Science , the American Chemical Society (ACS), the American Geosciences Institute (AGI), the Association for Women Geoscientists (AWG), and the Earth Science Women's Network (ESWN). Additionally, AGU staff are trained in how to address incidents of harassment at their annual meeting and wear "Safe AGU" buttons to signify themselves as resources. On February 27, 2018, AGU CEO Chris McEntee testified before
3618-609: A second meeting was held every Spring (April through May) in locations around the world. The latter grew out of AGU's annual Spring meeting, which had been held for many years in Baltimore , until declining interest caused AGU to move the meeting to different locations, starting with Boston in 1998. With the 2003 meeting in Nice , France, it became known as the Joint Assembly because AGU co-sponsors it with other societies such as
3752-508: A set of four criteria are met. However, when Texaco 's corporate library made systematic copies of journal articles for its collection, AGU and five other publishers took Texaco to court. The judges found for AGU. Texaco was fined and agreed to retroactively purchase a license from the Copyright Clearance Center . The presidents of the AGU have been: While more than 40 presidents have provided scientific leadership for
3886-613: A setback when its chairman, Peter Gleick , announced that he had lied to obtain internal documents from the Heartland Institute and then leaked them to the public. Gleick, a climate scientist and recipient of the MacArthur Fellowship , said he was motivated by frustration with the efforts of groups such as the Heartland Institute to attack climate science and scientists, but admitted that it
4020-464: A short-term political statement, the Board wished to engage with the energy industry over the long term. In response, Senator Sheldon Whitehouse and Representative Ted Lieu sent a critical letter saying that ExxonMobil continues to fund climate denial and is misleading the AGU. The Union of Concerned Scientists also sent a letter urging them to reconsider. However, in a meeting on September 23, 2016,
4154-442: A significant number of people associate themselves with the church on a regular basis, even if the church does not have a traditional established list of individual members. In order to qualify as a tax-exempt church, church activities must be a significant part of the organization's operations. An organization whose operations include a substantial nonexempt commercial purposes, such as operating restaurants and grocery stores in
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4288-423: A significant portion of a church school's curriculum is religious education. For a payment to be a tax-deductible charitable contribution, it must be a voluntary transfer of money or other property with no expectation of procuring financial benefit equal to the transfer amount. Before donating to a 501(c)(3) organization, a donor can consult the searchable online IRS list of charitable organizations to verify that
4422-608: A steady increase in brain size after about 3 million years ago . There is a long-running debate about whether modern humans are descendants of a single small population in Africa , which then migrated all over the world less than 200,000 years ago and replaced previous hominine species, or arose worldwide at the same time as a result of interbreeding . Life on earth has suffered occasional mass extinctions at least since 542 million years ago . Despite their disastrous effects, mass extinctions have sometimes accelerated
4556-432: A tax deduction on a charitable gift to a 501(c)(3) organization that is organized and operated exclusively for religious, charitable, scientific, literary or educational purposes, or to foster national or international amateur sports competition (but only if no part of its activities involve the provision of athletic facilities or equipment), or for the prevention of cruelty to children or animals. An individual may not take
4690-440: A tax deduction on gifts made to a 501(c)(3) organization that is organized and operated exclusively for the testing for public safety. In the case of tuition fees paid to a private 501(c)(3) school or a church school, the payments are not tax-deductible charitable contributions because they are payments for services rendered to the payee or the payee's children. The payments are not tax-deductible charitable contributions even if
4824-706: A two-year rolling period. The AGU hosts a number of blogs, collectively known as the AGU Blogosphere , informally publishing frequent updates on the Earth and space sciences. AGU publications are copyrighted, but in the United States many exceptions to the exclusive rights of copyright are allowed under the fair use provision, part of the Copyright Act of 1976 . Making copies of publications are allowed for such uses as teaching and research as long as
4958-557: Is a searchable database of information about organizations over time. WikiCharities, is a nonprofit database of nonprofits and charities by name, location, and topic, that allows each organization to report its financials, leadership, contacts, and other activities. Section 501(c)(3) organizations are prohibited from supporting political candidates, as a result of the Johnson Amendment enacted in 1954. Section 501(c)(3) organizations are subject to limits on lobbying , having
5092-434: Is allowed to award grants to foreign charitable organizations if the grants are intended for charitable purposes and the grant funds are subject to the 501(c)(3) organization's control. Additional procedures are required of 501(c)(3) organizations that are private foundations . Donors' contributions to a 501(c)(3) organization are tax-deductible only if the contribution is for the use of the 501(c)(3) organization, and that
5226-800: Is an actual controversy regarding a determination or the Internal Revenue Service has failed to make a determination. In these cases, the United States Tax Court , the United States District Court for the District of Columbia , and the United States Court of Federal Claims have concurrent jurisdiction to issue a declaratory judgment of the organization's qualification if the organization has exhausted administrative remedies with
5360-632: Is co-sponsored by the International Union of Radio Science . The journal Earth Interactions is published in partnership with the American Meteorological Society (AMS) and the Association of American Geographers (AAG). In addition, International Journal of Geomagnetism and Aeronomy is no longer published and AGU distributes Chinese Journal of Geophysics and Nonlinear Processes in Geophysics . Many of
5494-595: Is composed only of eukaryotic cells, and the earliest evidence for it is the Francevillian Group Fossils from 2,100 million years ago , although specialisation of cells for different functions first appears between 1,430 million years ago (a possible fungus) and 1,200 million years ago (a probable red alga ). Sexual reproduction may be a prerequisite for specialisation of cells, as an asexual multicellular organism might be at risk of being taken over by rogue cells that retain
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5628-482: Is hard to decide at what level to place a new higher-level grouping, e.g. genus or family or order ; this is important since the Linnaean rules for naming groups are tied to their levels, and hence if a group is moved to a different level it must be renamed. Paleontologists generally use approaches based on cladistics , a technique for working out the evolutionary "family tree" of a set of organisms. It works by
5762-608: Is no persuasive evidence that human activity is warming the planet. The court rejected Cuccinelli's demand. However, such legal challenges continue, so in 2012 AGU entered in a partnership with the Climate Science Legal Defense Fund to offer legal counseling at the Fall Meeting. In 2011, AGU created a Task Force on Scientific Ethics, "to review and update existing policies and procedures for dealing with scientific misconduct." This effort received
5896-478: Is not required to be made available to the public, unless the organization is an independent foundation. Churches are generally exempt from this reporting requirement. Every 501(c)(2) organization must make available for public inspection its application for tax-exemption, including its Form 1023 or Form 1023-EZ and any attachments, supporting documents, and follow-up correspondence with the Internal Revenue Service. The same public inspection requirement applies to
6030-492: Is now presumed in compliance with the substantiality test if they work within the limits. The Conable election requires a charity to file a declaration with the IRS and file a functional distribution of funds spreadsheet with their Form 990. IRS form 5768 is required to make the Conable election. A 501(c)(3) organization is allowed to conduct some or all of its charitable activities outside the United States. A 501(c)(3) organization
6164-443: Is often said to work by conducting experiments to disprove hypotheses about the workings and causes of natural phenomena. This approach cannot prove a hypothesis, since some later experiment may disprove it, but the accumulation of failures to disprove is often compelling evidence in favor. However, when confronted with totally unexpected phenomena, such as the first evidence for invisible radiation , experimental scientists often use
6298-594: Is one that contained an extinct "crocodile-like" marine reptile, which eventually came to be known as the mosasaurid Mosasaurus of the Cretaceous period. The first half of the 19th century saw geological and paleontological activity become increasingly well organised with the growth of geologic societies and museums and an increasing number of professional geologists and fossil specialists. Interest increased for reasons that were not purely scientific, as geology and paleontology helped industrialists to find and exploit natural resources such as coal. This contributed to
6432-401: Is our only means of giving rocks greater than about 50 million years old an absolute age, and can be accurate to within 0.5% or better. Although radiometric dating requires very careful laboratory work, its basic principle is simple: the rates at which various radioactive elements decay are known, and so the ratio of the radioactive element to the element into which it decays shows how long ago
6566-406: Is reduced to $ 400. There are some classes of organizations that automatically are treated as tax exempt under 501(c)(3), without the need to file Form 1023: The IRS released a software tool called Cyber Assistant in 2013, which was succeeded by Form 1023-EZ in 2014. There is an alternative way for an organization to obtain status if an organization has applied for a determination and either there
6700-467: Is that the organization is specifically limited in powers to purposes that the IRS classifies as tax-exempt purposes. Unlike for-profit corporations that benefit from broad and general purposes, non-profit organizations need to be limited in powers to function with tax-exempt status, but a non-profit corporation is by default not limited in powers until it specifically limits itself in the articles of incorporation or nonprofit corporate bylaws. This limiting of
6834-456: Is the scientific study of life that existed prior to the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossils to classify organisms and study their interactions with each other and their environments (their paleoecology ). Paleontological observations have been documented as far back as the 5th century BC. The science became established in
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#17327649352966968-503: Is thought to have been propelled by coevolution with pollinating insects. Social insects appeared around the same time and, although they account for only small parts of the insect "family tree", now form over 50% of the total mass of all insects. Humans evolved from a lineage of upright-walking apes whose earliest fossils date from over 6 million years ago . Although early members of this lineage had chimp -sized brains, about 25% as big as modern humans', there are signs of
7102-795: The Geochemical Society , the Mineralogical Society of America (MSA), the Canadian Geophysical Union (CGU), and the European Geosciences Union (EGU). The Fall Meeting had more than 25,000 attendees in 2018. In addition to the Fall meeting that covers all areas of the geophysical sciences, AGU sponsors many specialized meetings that are intended to serve the needs of particular scientific disciplines or geographical areas, including
7236-692: The House Committee on Science, Space, & Technology Subcommittee on Research and Technology Hearing – A Review of Sexual Harassment and Misconduct in Science. His testimony was alongside those of Rhonda Davis, head of the National Science Foundation 's (NSF) Office of Diversity and Inclusion, Kathryn Clancy , an anthropologist at the University of Illinois at Urbana-Champaign , and attorney Kristina Larsen. In July 2019,
7370-582: The Middle Ages the Persian naturalist Ibn Sina , known as Avicenna in Europe, discussed fossils and proposed a theory of petrifying fluids on which Albert of Saxony elaborated in the 14th century. The Chinese naturalist Shen Kuo (1031–1095) proposed a theory of climate change based on the presence of petrified bamboo in regions that in his time were too dry for bamboo. In early modern Europe ,
7504-538: The Neogene - Quaternary . In deeper-level deposits in western Europe are early-aged mammals such as the palaeothere perissodactyl Palaeotherium and the anoplotheriid artiodactyl Anoplotherium , both of which were described earliest after the former two genera, which today are known to date to the Paleogene period. Cuvier figured out that even older than the two levels of deposits with extinct large mammals
7638-637: The Permian–Triassic extinction event . Amphibians Extinct Synapsids Mammals Extinct reptiles Lizards and snakes Extinct Archosaurs Crocodilians Extinct Dinosaurs Birds Naming groups of organisms in a way that is clear and widely agreed is important, as some disputes in paleontology have been based just on misunderstandings over names. Linnaean taxonomy is commonly used for classifying living organisms, but runs into difficulties when dealing with newly discovered organisms that are significantly different from known ones. For example: it
7772-516: The Permian–Triassic extinction event . A relatively recent discipline, molecular phylogenetics , compares the DNA and RNA of modern organisms to re-construct the "family trees" of their evolutionary ancestors. It has also been used to estimate the dates of important evolutionary developments, although this approach is controversial because of doubts about the reliability of the " molecular clock ". Techniques from engineering have been used to analyse how
7906-541: The Society of Exploration Geophysicists . In a March 1919 report by a committee chaired by Robert S. Woodward of the Carnegie Institution , geophysics was defined as a collection of "borderlands" (closely related, mutually dependent subjects): astronomy , geodesy , geology, meteorology , oceanography , seismology , terrestrial magnetism , terrestrial electricity , tides , and volcanology . The AGU
8040-454: The embryological development of some modern brachiopods suggests that brachiopods may be descendants of the halkieriids , which became extinct in the Cambrian period. Paleontology seeks to map out how living things have changed through time. A substantial hurdle to this aim is the difficulty of working out how old fossils are. Beds that preserve fossils typically lack the radioactive elements needed for radiometric dating . This technique
8174-526: The " jigsaw puzzles " of biostratigraphy (arrangement of rock layers from youngest to oldest). Classifying ancient organisms is also difficult, as many do not fit well into the Linnaean taxonomy classifying living organisms, and paleontologists more often use cladistics to draw up evolutionary "family trees". The final quarter of the 20th century saw the development of molecular phylogenetics , which investigates how closely organisms are related by measuring
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#17327649352968308-434: The 14-point list is a guideline; it is not intended to be all-encompassing, and other facts and circumstances may be relevant factors. Although there is no definitive definition of a church for Internal Revenue Code purposes, in 1986 the United States Tax Court said that "A church is a coherent group of individuals and families that join together to accomplish the religious purposes of mutually held beliefs. In other words,
8442-463: The 18th century as a result of Georges Cuvier 's work on comparative anatomy , and developed rapidly in the 19th century. The term has been used since 1822 formed from Greek παλαιός ( 'palaios' , "old, ancient"), ὄν ( 'on' , ( gen. 'ontos' ), "being, creature"), and λόγος ( 'logos' , "speech, thought, study"). Paleontology lies on the border between biology and geology , but it differs from archaeology in that it excludes
8576-502: The 501(c)(3) designation. In 1980, the United States District Court for the District of Columbia recognized a 14-part test in determining whether a religious organization is considered a church for the purposes of the Internal Revenue Code: Having an established congregation served by an organized ministry is of central importance. Points 4, 6, 8, 11, 12, and 13 are also especially important. Nevertheless,
8710-405: The 501(c)(3) organization is not merely serving as an agent or conduit of a foreign charitable organization. The 501(c)(3) organization's management should review the grant application from the foreign organization, decide whether to award the grant based on the intended use of the funds, and require continuous oversight based on the use of funds. If the donor imposes a restriction or earmark that
8844-620: The AGU Board approved a new Organizational Support Policy. The policy covers subjects such as advertorials and member surveys. It requires that partnerships contribute to AGU's mission, vision and goals and that the AGU "apply vetting to ascertain that partners are not engaged in false misinterpretations of science." The sponsorship of AGU by ExxonMobil became a source of concern for many members after evidence surfaced that ExxonMobil had known about climate change for decades but had actively worked to undermine climate science. On February 22, 2016,
8978-539: The AGU since 1919, operational leadership has been provided by a larger team. The first senior team member was John Adam Fleming , who was elected Secretary in 1925 and changed the name of his position to General Secretary. He served as a volunteer while working at the Department of Terrestrial Magnetism at the Carnegie Institution. By 1943, with the membership nearing 2,000, AGU recognized the need for
9112-459: The AGU took place on April 23, 1920. In attendance were 25 members. Up to 1930, the number of members was restricted and members were elected. In 1932 the first annual dues of US$ 2 were imposed. The membership grew to 4,600 in 1950; 13,000 in 1980; and 26,000 in 1990. As of 2018, it had 62,000 members from 137 countries. AGU publishes the online magazine Eos and more than twenty peer-reviewed scientific journals : The journal Radio Science
9246-732: The AGU was awarded a three-year grant from the Alfred P. Sloan Foundation to launch the AGU Ethics and Equity Initiative, a collaboration among the AGU and the National Center for Professional and Research Ethics at the University of Illinois at Urbana–Champaign . The initiative will tackle issues around sexual harassment and gender-based discrimination by developing new educational resources and tracking tools to measure impact. In December 2022, AGU punished climate scientists Rose Abramoff and Peter Kalmus for misconduct, who interrupted
9380-658: The Board upheld its previous decision. In November 2021, AGU announced in a video presentation that, as a consequence of its Environmental, social, and corporate governance policies, it no longer had any direct investments in fossil-fuel companies and it was beginning to divest its investment portfolio from mutual fund holdings in fossil-fuel companies. 501(c)(3) 501(c)(3) tax-exemptions apply to entities that are organized and operated exclusively for religious , charitable , scientific , literary or educational purposes, for testing for public safety , to foster national or international amateur sports competition, or for
9514-548: The Court, if it were to squarely examine the political-activity prohibition of § 501(c)(3), would uphold it against a constitutional challenge. However, some have suggested that a successful challenge to the political activities prohibition of Section 501(c)(3) might be more plausible in light of Citizens United v. FEC . In contrast to the prohibition on political campaign interventions by all section 501(c)(3) organizations, public charities (but not private foundations) may conduct
9648-555: The Early Cambrian , along with several "weird wonders" that bear little obvious resemblance to any modern animals. There is a long-running debate about whether this Cambrian explosion was truly a very rapid period of evolutionary experimentation; alternative views are that modern-looking animals began evolving earlier but fossils of their precursors have not yet been found, or that the "weird wonders" are evolutionary "aunts" and "cousins" of modern groups. Vertebrates remained
9782-668: The Earth and space sciences. The geophysical sciences involve four fundamental areas: atmospheric and ocean sciences ; solid-Earth sciences ; hydrologic sciences ; and space sciences . The organization's headquarters is located on Florida Avenue in Washington, D.C. The AGU was established in December 1919 by the National Research Council (NRC) to represent the United States in the International Union of Geodesy and Geophysics (IUGG), and its first chairman
9916-686: The Earth's deep interior; tectonophysics ; volcanology , geochemistry , and petrology . AGU holds an annual meeting every December (known as the Fall Meeting). Until 2017, the meeting was held yearly in San Francisco. Because of renovations at the San Francisco venue, the 2017 meeting took place in New Orleans and the 2018 meeting in Washington, DC. It returned to San Francisco in 2019 and its location will rotate among San Francisco, New Orleans, Chicago, and Washington, DC . Previously,
10050-411: The Earth's organic and inorganic past". William Whewell (1794–1866) classified paleontology as one of the historical sciences, along with archaeology , geology, astronomy , cosmology , philology and history itself: paleontology aims to describe phenomena of the past and to reconstruct their causes. Hence it has three main elements: description of past phenomena; developing a general theory about
10184-428: The Earth's surface. The statement continued, Present understanding of the Earth climate system provides a compelling basis for legitimate public concern over future global and regional-scale changes resulting from increased concentrations of greenhouse gases. After a discussion of scientific uncertainties the statement concluded AGU believes that the present level of scientific uncertainty does not justify inaction in
10318-432: The Internal Revenue Service. Prior to October 9, 1969, nonprofit organizations could declare themselves to be tax-exempt under Section 501(c)(3) without first obtaining Internal Revenue Service recognition by filing Form 1023 and receiving a determination letter. A nonprofit organization that did so prior to that date could still be subject to challenge of its status by the Internal Revenue Service. Individuals may take
10452-598: The Ocean Sciences Meeting, which is held in even numbered years. Small, highly focused meetings are offered through the Chapman Conferences. The large numbers and international participation in the Fall Meeting results in a large contribution to greenhouse gases . The 9500 participants in the 2002 meeting traveled an average of 8,000 kilometres (5,000 mi) to attend, producing 1.3 metric tons of carbon dioxide, or one-sixteenth of
10586-412: The ability to reproduce. The earliest known animals are cnidarians from about 580 million years ago , but these are so modern-looking that they must be descendants of earlier animals. Early fossils of animals are rare because they had not developed mineralised , easily fossilized hard parts until about 548 million years ago . The earliest modern-looking bilaterian animals appear in
10720-515: The appearance of moderately complex animals (comparable to earthworms ). Geochemical observations may help to deduce the global level of biological activity at a certain period, or the affinity of certain fossils. For example, geochemical features of rocks may reveal when life first arose on Earth, and may provide evidence of the presence of eukaryotic cells, the type from which all multicellular organisms are built. Analyses of carbon isotope ratios may help to explain major transitions such as
10854-625: The atmosphere increased their effectiveness as nurseries of evolution. While eukaryotes , cells with complex internal structures, may have been present earlier, their evolution speeded up when they acquired the ability to transform oxygen from a poison to a powerful source of metabolic energy. This innovation may have come from primitive eukaryotes capturing oxygen-powered bacteria as endosymbionts and transforming them into organelles called mitochondria . The earliest evidence of complex eukaryotes with organelles (such as mitochondria) dates from 1,850 million years ago . Multicellular life
10988-407: The average yearly emissions for Americans. The AGU has made some adjustments such as asking shuttle bus drivers to turn off their engines when they are not moving, but 95% of the emissions come from jet fuel . In an unpublished study, David Scott and Lawrence Plug of Dalhousie University estimated that the AGU could reduce emissions by 7.7% if it moved the Fall Meeting to Denver , Colorado. In 2017,
11122-415: The bodies of ancient organisms might have worked, for example the running speed and bite strength of Tyrannosaurus , or the flight mechanics of Microraptor . It is relatively commonplace to study the internal details of fossils using X-ray microtomography . Paleontology, biology, archaeology, and paleoneurobiology combine to study endocranial casts (endocasts) of species related to humans to clarify
11256-416: The broader public. Members of the AGU who work in politically-controversial fields have come under legal attack. For example, Michael Mann , a Fellow of the AGU and lead author of the original " hockey stick graph " study, faced a legal demand to turn over his private emails from Kenneth Cuccinelli II , at the time the attorney general of the state of Virginia, a conservative Republican who argues that there
11390-401: The causes of various types of change; and applying those theories to specific facts. When trying to explain the past, paleontologists and other historical scientists often construct a set of one or more hypotheses about the causes and then look for a " smoking gun ", a piece of evidence that strongly accords with one hypothesis over any others. Sometimes researchers discover a "smoking gun" by
11524-763: The characteristics and evolution of humans as a species. When dealing with evidence about humans, archaeologists and paleontologists may work together – for example paleontologists might identify animal or plant fossils around an archaeological site , to discover the people who lived there, and what they ate; or they might analyze the climate at the time of habitation. In addition, paleontology often borrows techniques from other sciences, including biology, osteology , ecology, chemistry , physics and mathematics. For example, geochemical signatures from rocks may help to discover when life first arose on Earth, and analyses of carbon isotope ratios may help to identify climate changes and even to explain major transitions such as
11658-520: The chronological order in which rocks were formed, is useful to both paleontologists and geologists. Biogeography studies the spatial distribution of organisms, and is also linked to geology, which explains how Earth's geography has changed over time. Although paleontology became established around 1800, earlier thinkers had noticed aspects of the fossil record. The ancient Greek philosopher Xenophanes (570–480 BCE) concluded from fossil sea shells that some areas of land were once under water. During
11792-405: The contribution must be used for foreign activities, then the contribution is deemed to be for the foreign organization rather than the 501(c)(3) organization, and the contribution is not tax-deductible. The purpose of the grant to the foreign organization cannot include endorsing or opposing political candidates for elected office in any country. If a 501(c)(3) organization sets up and controls
11926-445: The date when lineages first appeared. For instance, if fossils of B or C date to X million years ago and the calculated "family tree" says A was an ancestor of B and C, then A must have evolved more than X million years ago. It is also possible to estimate how long ago two living clades diverged – i.e. approximately how long ago their last common ancestor must have lived – by assuming that DNA mutations accumulate at
12060-594: The development of mammalian traits such as endothermy and hair. After the Cretaceous–Paleogene extinction event 66 million years ago killed off all the dinosaurs except the birds, mammals increased rapidly in size and diversity, and some took to the air and the sea. Fossil evidence indicates that flowering plants appeared and rapidly diversified in the Early Cretaceous between 130 million years ago and 90 million years ago . Their rapid rise to dominance of terrestrial ecosystems
12194-561: The development of the body plans of most animal phyla . The discovery of fossils of the Ediacaran biota and developments in paleobiology extended knowledge about the history of life back far before the Cambrian. Increasing awareness of Gregor Mendel 's pioneering work in genetics led first to the development of population genetics and then in the mid-20th century to the modern evolutionary synthesis , which explains evolution as
12328-482: The different levels of deposits represented different time periods in the early 19th century. The surface-level deposits in the Americas contained later mammals like the megatheriid ground sloth Megatherium and the mammutid proboscidean Mammut (later known informally as a "mastodon"), which were some of the earliest-named fossil mammal genera with official taxonomic authorities. They today are known to date to
12462-409: The end of the 20th century have been particularly important as they have provided new information about the earliest evolution of animals, early fish, dinosaurs and the evolution of birds. The last few decades of the 20th century saw a renewed interest in mass extinctions and their role in the evolution of life on Earth. There was also a renewed interest in the Cambrian explosion that apparently saw
12596-410: The evolution of the human brain. Paleontology even contributes to astrobiology , the investigation of possible life on other planets , by developing models of how life may have arisen and by providing techniques for detecting evidence of life. As knowledge has increased, paleontology has developed specialised subdivisions. Vertebrate paleontology concentrates on fossils from the earliest fish to
12730-466: The evolutionary history of life back to over 3,000 million years ago , possibly as far as 3,800 million years ago . The oldest clear evidence of life on Earth dates to 3,000 million years ago , although there have been reports, often disputed, of fossil bacteria from 3,400 million years ago and of geochemical evidence for the presence of life 3,800 million years ago . Some scientists have proposed that life on Earth
12864-555: The exceptional events that cause quick burial make it difficult to study the normal environments of the animals. The sparseness of the fossil record means that organisms are expected to exist long before and after they are found in the fossil record – this is known as the Signor–Lipps effect . Trace fossils consist mainly of tracks and burrows, but also include coprolites (fossil feces ) and marks left by feeding. Trace fossils are particularly significant because they represent
12998-765: The first joint JpGU-AGU meeting was held in Chiba, Japan. The meeting was a joint effort between AGU and the Japan Geoscience Union . On occasion the AGU Council issues position statements on matters affecting public policy that are related to geophysics. These include biological evolution , natural hazards , science education and funding, and climate change . The AGU adopted its first position statement on climate change in December 1998. That statement began Atmospheric concentrations of carbon dioxide and other greenhouse gases have substantially increased as
13132-515: The focus of paleontology shifted to understanding evolutionary paths, including human evolution , and evolutionary theory. The last half of the 19th century saw a tremendous expansion in paleontological activity, especially in North America. The trend continued in the 20th century with additional regions of the Earth being opened to systematic fossil collection. Fossils found in China near
13266-449: The following: At the end of the 18th century Georges Cuvier 's work established comparative anatomy as a scientific discipline and, by proving that some fossil animals resembled no living ones, demonstrated that animals could become extinct , leading to the emergence of paleontology. The expanding knowledge of the fossil record also played an increasing role in the development of geology, particularly stratigraphy . Cuvier proved that
13400-533: The foreign organization, then donors' contributions to the 501(c)(3) organization are not tax-deductible to the donors. The main differences between 501(c)(3) and 501(c)(4) organizations lie in their purposes and the tax-exempt benefits they receive. Here is a brief explanation of the differences: Paleontology Paleontology ( / ˌ p eɪ l i ɒ n ˈ t ɒ l ə dʒ i , ˌ p æ l i -, - ən -/ PAY -lee-on- TOL -ə-jee, PAL -ee-, -ən- ), also spelled palaeontology or palæontology ,
13534-580: The fossil record: different environments are more favorable to the preservation of different types of organism or parts of organisms. Further, only the parts of organisms that were already mineralised are usually preserved, such as the shells of molluscs. Since most animal species are soft-bodied, they decay before they can become fossilised. As a result, although there are 30-plus phyla of living animals, two-thirds have never been found as fossils. Occasionally, unusual environments may preserve soft tissues. These lagerstätten allow paleontologists to examine
13668-687: The history and driving forces behind their evolution. Land plants were so successful that their detritus caused an ecological crisis in the Late Devonian , until the evolution of fungi that could digest dead wood. During the Permian period, synapsids , including the ancestors of mammals , may have dominated land environments, but this ended with the Permian–Triassic extinction event 251 million years ago , which came very close to wiping out all complex life. The extinctions were apparently fairly sudden, at least among vertebrates. During
13802-533: The history of Earth's climate and the mechanisms that have changed it – which have sometimes included evolutionary developments, for example the rapid expansion of land plants in the Devonian period removed more carbon dioxide from the atmosphere, reducing the greenhouse effect and thus helping to cause an ice age in the Carboniferous period. Biostratigraphy , the use of fossils to work out
13936-542: The immediate ancestors of modern mammals . Invertebrate paleontology deals with fossils such as molluscs , arthropods , annelid worms and echinoderms . Paleobotany studies fossil plants , algae , and fungi. Palynology , the study of pollen and spores produced by land plants and protists , straddles paleontology and botany , as it deals with both living and fossil organisms. Micropaleontology deals with microscopic fossil organisms of all kinds. Instead of focusing on individual organisms, paleoecology examines
14070-434: The index fossils turn out to have longer fossil ranges than first thought. Stratigraphy and biostratigraphy can in general provide only relative dating ( A was before B ), which is often sufficient for studying evolution. However, this is difficult for some time periods, because of the problems involved in matching up rocks of the same age across different continents . Family-tree relationships may also help to narrow down
14204-538: The interactions between different ancient organisms, such as their food chains , and the two-way interactions with their environments. For example, the development of oxygenic photosynthesis by bacteria caused the oxygenation of the atmosphere and hugely increased the productivity and diversity of ecosystems . Together, these led to the evolution of complex eukaryotic cells, from which all multicellular organisms are built. Paleoclimatology , although sometimes treated as part of paleoecology, focuses more on
14338-463: The internal anatomy of animals that in other sediments are represented only by shells, spines, claws, etc. – if they are preserved at all. However, even lagerstätten present an incomplete picture of life at the time. The majority of organisms living at the time are probably not represented because lagerstätten are restricted to a narrow range of environments, e.g. where soft-bodied organisms can be preserved very quickly by events such as mudslides; and
14472-456: The investigation of evolutionary "family trees" by techniques derived from biochemistry , began to make an impact, particularly when it was proposed that the human lineage had diverged from apes much more recently than was generally thought at the time. Although this early study compared proteins from apes and humans, most molecular phylogenetics research is now based on comparisons of RNA and DNA . Fossils of organisms' bodies are usually
14606-406: The journal code (GL), and an article number (014304). This new system was met with complaints from libraries and scientists. The article numbers provided no clue for libraries to find an article in printed versions, and even scientific databases were not set up to handle DOIs. AGU officials claimed that the problems were a temporary cost of being a frontrunner, but did retroactively assign each article
14740-636: The journals have high impact factors , with Paleoceanography having the highest within paleontology and Reviews of Geophysics the second highest within geochemistry and geophysics as of 2010. AGU has also been publishing books for more than 85 years. AGU has also partnered with societies to publish: AGU co-published (along with the AMS and the AAG) its first electronic journal, Earth Interactions , in 1997. It started its own electronic journal, Geochemistry, Geophysics , Geosystems , in December 1999. It made
14874-409: The logic that, if groups B and C have more similarities to each other than either has to group A, then B and C are more closely related to each other than either is to A. Characters that are compared may be anatomical , such as the presence of a notochord , or molecular , by comparing sequences of DNA or proteins . The result of a successful analysis is a hierarchy of clades – groups that share
15008-621: The meeting. Abramoff was fired by Oak Ridge in January 2023. In 2014, the AGU accepted 5469 gifts, grants and pledges from individuals and corporations. Of these, the 1919 Society (gifts of over $ 100,000) included ExxonMobil , Integrated Ocean Drilling Program Management International, and Nature's Own . AGU also was found to have many annual events sponsored by corporations, including an annual Student Breakfast (supported by ExxonMobil) and Amazon Web Services supported research grants and that offer access to its cloud computing resources. In 2015,
15142-802: The membership can be elected each year. The AGU is divided into 25 sections that provide the main structure for managing volunteers, developing leaders and honoring scientists. These sections also reflect the breadth of science within Earth and space science: atmospheric and space electricity ; atmospheric sciences ; biogeosciences ; cryosphere sciences; Earth and planetary surface processes; Earth and space science informatics ; education; geodesy ; geohealth ; geomagnetism ; paleomagnetism and electromagnetism ; hydrology ; mineral and rock physics ; natural hazards ; near surface geophysics ; nonlinear geophysics ; ocean sciences ; paleoceanography ; planetary sciences ; seismology ; societal impacts and policy sciences ; space physics and aeronomy ; study of
15276-741: The mitigation of human induced climate change and/or the adaptation to it. The adopted position statement was backed up by a detailed supporting document. The AGU position statement has undergone several revisions, most recently revised and reaffirmed in 2012. In 2014, AGU developed the Sharing Science program to provide scientists with the skills and tools that they need to communicate science with any audience. The program offers resources, workshops, hands-on support, and opportunities to help scientists more effectively communicate with broader audiences about Earth and space science. Audiences range from journalists, educators and students, policy makers, and
15410-409: The most informative type of evidence. The most common types are wood, bones, and shells. Fossilisation is a rare event, and most fossils are destroyed by erosion or metamorphism before they can be observed. Hence the fossil record is very incomplete, increasingly so further back in time. Despite this, it is often adequate to illustrate the broader patterns of life's history. There are also biases in
15544-515: The organization in favor of or in opposition to any candidate for public office clearly violate the prohibition against political campaign activity. Violating this prohibition may result in denial or revocation of tax-exempt status and the imposition of certain excise taxes. Certain activities or expenditures may not be prohibited depending on the facts and circumstances. For example, certain voter education activities (including presenting public forums and publishing voter education guides) conducted in
15678-435: The organization qualifies to receive tax-deductible charitable contributions. Consumers may file IRS Form 13909, with documentation, to complain about inappropriate or fraudulent (i.e., fundraising, political campaigning, lobbying) activities by any 501(c)(3) organization. Most 501(c)(3) must disclose the names and addresses of certain large donors to the Internal Revenue Service on their annual returns, but this information
15812-840: The organization's annual return, namely its Form 990 , Form 990-EZ, Form 990-PF, Form 990-T, and Form 1065, including any attachments, supporting documents, and follow-up correspondence with the Internal Revenue Service, with the exception of the names and addresses of donors on Schedule B. Annual returns must be publicly available for a three-year period beginning with the due date of the return, including any extension of time for filing. The Internal Revenue Service provides information about specific 501(c)(3) organizations through its Tax Exempt Organization Search online. A private nonprofit organization, GuideStar , provides information on 501(c)(3) organizations. ProPublica's Nonprofit Explorer provides copies of each organization's Form 990 and, for some organizations, audited financial statements. Open990
15946-414: The outcome of events such as mutations and horizontal gene transfer , which provide genetic variation , with genetic drift and natural selection driving changes in this variation over time. Within the next few years the role and operation of DNA in genetic inheritance were discovered, leading to what is now known as the "Central Dogma" of molecular biology . In the 1960s molecular phylogenetics ,
16080-409: The powers is crucial to obtaining tax exempt status with the IRS and then on the state level. Organizations acquire 501(c)(3) tax exemption by filing IRS Form 1023 . As of 2006 , the form must be accompanied by an $ 850 filing fee if the yearly gross receipts for the organization are expected to average $ 10,000 or more. If yearly gross receipts are expected to average less than $ 10,000, the filing fee
16214-676: The prevention of cruelty to children or animals . 501(c)(3) exemption applies also for any non-incorporated community chest , fund, cooperating association or foundation organized and operated exclusively for those purposes. There are also supporting organizations—often referred to in shorthand form as "Friends of" organizations. 26 U.S.C. § 170 provides a deduction for federal income tax purposes, for some donors who make charitable contributions to most types of 501(c)(3) organizations, among others. Regulations specify which such deductions must be verifiable to be allowed (e.g., receipts for donations of $ 250 or more). Due to
16348-452: The principal types of evidence about ancient life, and geochemical evidence has helped to decipher the evolution of life before there were organisms large enough to leave body fossils. Estimating the dates of these remains is essential but difficult: sometimes adjacent rock layers allow radiometric dating , which provides absolute dates that are accurate to within 0.5%, but more often paleontologists have to rely on relative dating by solving
16482-432: The radioactive element was incorporated into the rock. Radioactive elements are common only in rocks with a volcanic origin, and so the only fossil-bearing rocks that can be dated radiometrically are a few volcanic ash layers. Consequently, paleontologists must usually rely on stratigraphy to date fossils. Stratigraphy is the science of deciphering the "layer-cake" that is the sedimentary record, and has been compared to
16616-701: The same approach as historical scientists: construct a set of hypotheses about the causes and then look for a "smoking gun". Paleontology lies between biology and geology since it focuses on the record of past life, but its main source of evidence is fossils in rocks. For historical reasons, paleontology is part of the geology department at many universities: in the 19th and early 20th centuries, geology departments found fossil evidence important for dating rocks, while biology departments showed little interest. Paleontology also has some overlap with archaeology , which primarily works with objects made by humans and with human remains, while paleontologists are interested in
16750-478: The similarity of the DNA in their genomes . Molecular phylogenetics has also been used to estimate the dates when species diverged, but there is controversy about the reliability of the molecular clock on which such estimates depend. The simplest definition of "paleontology" is "the study of ancient life". The field seeks information about several aspects of past organisms: "their identity and origin, their environment and evolution, and what they can tell us about
16884-470: The slow recovery from this catastrophe a previously obscure group, archosaurs , became the most abundant and diverse terrestrial vertebrates. One archosaur group, the dinosaurs, were the dominant land vertebrates for the rest of the Mesozoic , and birds evolved from one group of dinosaurs. During this time mammals' ancestors survived only as small, mainly nocturnal insectivores , which may have accelerated
17018-631: The study of anatomically modern humans . It now uses techniques drawn from a wide range of sciences, including biochemistry , mathematics , and engineering. Use of all these techniques has enabled paleontologists to discover much of the evolutionary history of life , almost back to when Earth became capable of supporting life, nearly 4 billion years ago. As knowledge has increased, paleontology has developed specialised sub-divisions, some of which focus on different types of fossil organisms while others study ecology and environmental history, such as ancient climates . Body fossils and trace fossils are
17152-629: The systematic study of fossils emerged as an integral part of the changes in natural philosophy that occurred during the Age of Reason . In the Italian Renaissance, Leonardo da Vinci made various significant contributions to the field as well as depicted numerous fossils. Leonardo's contributions are central to the history of paleontology because he established a line of continuity between the two main branches of paleontology – ichnology and body fossil paleontology. He identified
17286-503: The tax deductions associated with donations, loss of 501(c)(3) status can be highly challenging if not fatal to a charity's continued operation, as many foundations and corporate matching funds do not grant funds to a charity without such status, and individual donors often do not donate to such a charity due to the unavailability of tax deduction for contributions. The two exempt classifications of 501(c)(3) organizations are as follows: The basic requirement of obtaining tax-exempt status
17420-406: The word "palaeontology" to refer to the study of ancient living organisms through fossils. As knowledge of life's history continued to improve, it became increasingly obvious that there had been some kind of successive order to the development of life. This encouraged early evolutionary theories on the transmutation of species . After Charles Darwin published Origin of Species in 1859, much of
17554-454: Was "seeded" from elsewhere , but most research concentrates on various explanations of how life could have arisen independently on Earth. For about 2,000 million years microbial mats , multi-layered colonies of different bacteria, were the dominant life on Earth. The evolution of oxygenic photosynthesis enabled them to play the major role in the oxygenation of the atmosphere from about 2,400 million years ago . This change in
17688-606: Was William Bowie of the United States Coast and Geodetic Survey (USCGS). For more than 50 years, it operated as an unincorporated affiliate of the National Academy of Sciences . On June 29, 1972, AGU was incorporated in the District of Columbia and membership was opened to scientists and students worldwide. The AGU was intended to promote "pure" geophysics; exploration geophysics has its own society,
17822-740: Was a serious lapse of judgement. He resigned from the task force on February 16, 2012, and was replaced by Linda Gundersen, director of the Office of Science Quality and Integrity at the United States Geological Survey (USGS). In 2017, AGU adopted and updated ethics policy, called the AGU Scientific Integrity and Professional Ethics. Among other updates, the policy updated its definitions of what counts as scientific misconduct to include harassment , bullying , and discrimination. The change came, in part, as
17956-448: Was organized under seven sections: Geodesy , Seismology, Meteorology , Terrestrial magnetism and electricity, Oceanography , Volcanology , and Geophysical chemistry. Hydrology was added in 1930 and Tectonophysics in 1940. In suggesting the latter name, Norman Bowen evoked a familiar theme: to "designate this new borderline field between geophysics , physics and geology for the solution of problems of tectonics." The first meeting of
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