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Alberta	717	Government and politics	As King of Canada, Charles III is the head of state of Alberta. His duties concerning the Government of Alberta are carried out by Lieutenant Governor Salma Lakhani. The King and lieutenant governor are figureheads whose actions are highly restricted by custom and constitutional convention. The lieutenant governor handles numerous honorific duties in the name of the King. The government is headed by the premier. The premier is normally a member of the Legislative Assembly, and draws all the members of the Cabinet from among the members of the Legislative Assembly. The City of Edmonton is the seat of the provincial government—the capital of Alberta. The current premier is Danielle Smith, who was sworn in on October 11, 2022.
Alberta	717	Government and politics	Alberta's elections have tended to yield much more conservative outcomes than those of other Canadian provinces. From the 1980s to the 2010s, Alberta had three main political parties, the Progressive Conservatives ("Conservatives" or "Tories"), the Liberals, and the social democratic New Democrats. The Wildrose Party, a more libertarian party formed in early 2008, gained much support in the 2012 election and became the official opposition, a role it held until 2017 when it was dissolved and succeeded by the new United Conservative Party created by the merger of Wildrose and the Progressive Conservatives. The strongly conservative Social Credit Party was a power in Alberta for many decades, but fell from the political map after the Progressive Conservatives came to power in 1971.
Alberta	717	Government and politics	For 44 years the Progressive Conservatives governed Alberta. They lost the 2015 election to the NDP (which formed their own government for the first time in provincial history, breaking almost 80 consecutive years of right-wing rule), suggesting at the time a possible shift to the left in the province, also indicated by the election of progressive mayors in both of Alberta's major cities. Since becoming a province in 1905, Alberta has seen only five changes of government—only six parties have governed Alberta: the Liberals, from 1905 to 1921; the United Farmers of Alberta, from 1921 to 1935; the Social Credit Party, from 1935 to 1971; the Progressive Conservative Party, from 1971 to 2015; from 2015 to 2019, the Alberta New Democratic Party; and from 2019, the United Conservative Party, with the most recent transfer of power being the first time in provincial history that an incumbent government was not returned to a second term.
Alberta	717	Government and politics	The province is divided into ten types of local governments – urban municipalities (including cities, towns, villages and summer villages), specialized municipalities, rural municipalities (including municipal districts (often named as counties), improvement districts, and special areas), Métis settlements, and Indian reserves. All types of municipalities are governed by local residents and were incorporated under various provincial acts, with the exception of improvement districts (governed by either the provincial or federal government), and Indian reserves (governed by local band governments under federal jurisdiction).
Alberta	717	Government and politics	Policing in the province of Alberta upon its creation was the responsibility of the Royal Northwest Mounted Police. In 1917, due to pressures of the First World War, the Alberta Provincial Police was created. This organization policed the province until it was disbanded as a Great Depression-era cost-cutting measure in 1932. It was at that time the, now renamed, Royal Canadian Mounted Police resumed policing of the province, specifically RCMP "K" Division. With the advent of the Alberta Sheriffs Branch, the distribution of duties of law enforcement in Alberta has been evolving as certain aspects, such as traffic enforcement, mobile surveillance and the close protection of the Premier of Alberta have been transferred to the Sheriffs. In 2006, Alberta formed the Alberta Law Enforcement Response Teams (ALERT) to combat organized crime and the serious offences that accompany it. ALERT is made up of members of the RCMP, Sheriffs Branch, and various major municipal police forces in Alberta.
Alberta	717	Government and politics	Military bases in Alberta include Canadian Forces Base (CFB) Cold Lake, CFB Edmonton, CFB Suffield and CFB Wainwright. Air force units stationed at CFB Cold Lake have access to the Cold Lake Air Weapons Range. CFB Edmonton is the headquarters for the 3rd Canadian Division. CFB Suffield hosts British troops and is the largest training facility in Canada.
Alberta	717	Government and politics	According to Alberta's 2009 budget, government revenue in that year came mainly from royalties on non-renewable natural resources (30.4%), personal income taxes (22.3%), corporate and other taxes (19.6%), and grants from the federal government primarily for infrastructure projects (9.8%). In 2014, Alberta received $6.1 billion in bitumen royalties. With the drop in the price of oil in 2015 it was down to $1.4 billion. In 2016, Alberta received "about $837 million in royalty payments from oil sands Royalty Projects". According to the 2018–2021 fiscal plan, the two top sources of revenue in 2016 were personal income tax at $10,763 million and federal transfers of $7,976 million with total resource revenue at $3,097 million. Alberta is the only province in Canada without a provincial sales tax. Alberta residents are subject to the federal sales tax, the Goods and Services Tax of 5%.
Alberta	717	Government and politics	From 2001 to 2016, Alberta was the only Canadian province to have a flat tax of 10% of taxable income, which was introduced by Premier, Ralph Klein, as part of the Alberta Tax Advantage, which also included a zero-percent tax on income below a "generous personal exemption".
Alberta	717	Government and politics	In 2016, under Premier Rachel Notley, while most Albertans continued to pay the 10% income tax rate, new tax brackets 12%, 14%, and 15% for those with higher incomes ($128,145 annually or more) were introduced. Alberta's personal income tax system maintained a progressive character by continuing to grant residents personal tax exemptions of $18,451, in addition to a variety of tax deductions for persons with disabilities, students, and the aged. Alberta's municipalities and school jurisdictions have their own governments who usually work in co-operation with the provincial government. By 2018, most Albertans continued to pay the 10% income tax rate.
Alberta	717	Government and politics	According to a March 2015 Statistics Canada report, the median household income in Alberta in 2014 was about $100,000, which is 23% higher than the Canadian national average.
Alberta	717	Government and politics	Based on Statistic Canada reports, low-income Albertans, who earn less than $25,000 and those in the high-income bracket earning $150,000 or more, are the lowest-taxed people in Canada. Those in the middle income brackets representing those that earn about $25,000 to $75,000 pay more in provincial taxes than residents in British Columbia and Ontario. In terms of income tax, Alberta is the "best province" for those with a low income because there is no provincial income tax for those who earn $18,915 or less. Even with the 2016 progressive tax brackets up to 15%, Albertans who have the highest incomes, those with a $150,000 annual income or more—about 178,000 people in 2015, pay the least in taxes in Canada. — About 1.9 million Albertans earned between $25,000 and $150,000 in 2015.
Alberta	717	Government and politics	Alberta also privatized alcohol distribution. By 2010, privatization had increased outlets from 304 stores to 1,726; 1,300 jobs to 4,000 jobs; and 3,325 products to 16,495 products. Tax revenue also increased from $400 million to $700 million.
Alberta	717	Government and politics	In 2017/18 Alberta collected about $2.4 billion in education property taxes from municipalities. Alberta municipalities raise a significant portion of their income through levying property taxes. The value of assessed property in Alberta was approximately $727 billion in 2011. Most real property is assessed according to its market value. The exceptions to market value assessment are farmland, railways, machinery and equipment and linear property, all of which is assessed by regulated rates. Depending on the property type, property owners may appeal a property assessment to their municipal 'Local Assessment Review Board', 'Composite Assessment Review Board,' or the Alberta Municipal Government Board.
Alberta	717	Culture	Calgary is famous for its Stampede, dubbed "The Greatest Outdoor Show on Earth". The Stampede is Canada's biggest rodeo festival and features various races and competitions, such as calf roping and bull riding. In line with the western tradition of rodeo are the cultural artisans that reside and create unique Alberta western heritage crafts.
Alberta	717	Culture	Summer brings many festivals to Alberta, especially in Edmonton. The Edmonton Fringe Festival is the world's second-largest after the Edinburgh Festival. Both Calgary and Edmonton host many annual festivals and events, including folk music festivals. The city's "heritage days" festival sees the participation of over 70 ethnic groups. Edmonton's Churchill Square is home to a large number of the festivals, including A Taste of Edmonton and The Works Art & Design Festival throughout the summer months.
Alberta	717	Culture	In 2019, Minister of Culture and Tourism Ricardo Miranda announced the Alberta Artist in Residence program in conjunction with the province's first Month of the Artist to celebrate the arts and the value they bring to the province, both socially and economically, The artist is selected each year via a public and competitive process is expected to do community outreach and attend events to promote the arts throughout the province. The award comes with $60,000 funding which includes travel and materials costs. On January 31, 2019, Lauren Crazybull was named Alberta's first artist in residence. Alberta is the first province to launch an artist in residence program in Canada.
Alberta	717	Education	As with any Canadian province, the Alberta Legislature has (almost) exclusive authority to make laws respecting education. Since 1905, the Legislature has used this capacity to continue the model of locally elected public and separate school boards which originated prior to 1905, as well as to create and regulate universities, colleges, technical institutions, and other educational forms and institutions (public charter schools, private schools, homeschooling).
Alberta	717	Education	There are forty-two public school jurisdictions in Alberta, and seventeen operating separate school jurisdictions. Sixteen of the operating separate school jurisdictions have a Catholic electorate, and one (St. Albert) has a Protestant electorate. In addition, one Protestant separate school district, Glen Avon, survives as a ward of the St. Paul Education Region. The City of Lloydminster straddles the Albertan/Saskatchewan border, and both the public and separate school systems in that city are counted in the above numbers: both of them operate according to Saskatchewan law.
Alberta	717	Education	For many years the provincial government has funded the greater part of the cost of providing K–12 education. Prior to 1994 public and separate school boards in Alberta had the legislative authority to levy a local tax on property as supplementary support for local education. In 1994, the government of the province eliminated this right for public school boards, but not for separate school boards. Since 1994 there has continued to be a tax on property in support of K–12 education; the difference is that the provincial government now sets the mill rate, the money is collected by the local municipal authority and remitted to the provincial government. The relevant legislation requires that all the money raised by this property tax must go to support K–12 education provided by school boards. The provincial government pools the property tax funds from across the province and distributes them, according to a formula, to public and separate school jurisdictions and Francophone authorities.
Alberta	717	Education	Public and separate school boards, charter schools, and private schools all follow the Program of Studies and the curriculum approved by the provincial department of education (Alberta Education). Homeschool tutors may choose to follow the Program of Studies or develop their own Program of Studies. Public and separate schools, charter schools, and approved private schools all employ teachers who are certificated by Alberta Education, they administer Provincial Achievement Tests and Diploma Examinations set by Alberta Education, and they may grant high school graduation certificates endorsed by Alberta Education.
Alberta	717	Education	Several publicly funded post-secondary institutions are governed under the province's Post-secondary Learning Act. This includes four comprehensive research universities that provides undergraduate and graduate degrees, Athabasca University, the University of Alberta, the University of Calgary, and the University of Lethbridge; and three undergraduate universities that primarily provide bachelor's degrees, the Alberta University of the Arts, Grant MacEwan University, and Mount Royal University.
Alberta	717	Education	Nine comprehensive community colleges offer primarily offer diploma and certificate programs, Bow Valley College, Keyano College, Lakeland College, Lethbridge College, Medicine Hat College, NorQuest College, Northern Lakes College, Olds College, and Portage College. In addition, there are also four polytechnic institutes that provide specific career training and provides apprenticeships and diplomas, the Northern Alberta Institute of Technology, the Southern Alberta Institute of Technology, Northwestern Polytechnic, and Red Deer Polytechnic. The Banff Centre for Arts and Creativity is a specialized arts and cultural institution that is also empowered to provide diploma programs under the Post-secondary Learning Act.
Alberta	717	Education	Alberta is also home to five independent postsecondary institutions that provide diplomas/degrees for approved programming, Ambrose University, Burman University, Concordia University of Edmonton, The King's University, and St. Mary's University. Although the five institutions operate under their own legislation, they remain partly governed by the province's Post-secondary Learning Act. In addition to these institutions, there are also 190 private career colleges in Alberta.
Alberta	717	Education	There was some controversy in 2005 over the rising cost of post-secondary education for students (as opposed to taxpayers). In 2005, Premier Ralph Klein made a promise that he would freeze tuition and look into ways of reducing schooling costs.
Alberta	717	Health care	Alberta provides a publicly funded, fully integrated health system, through Alberta Health Services (AHS)—a quasi-independent agency that delivers health care on behalf of the Government of Alberta's Ministry of Health. The Alberta government provides health services for all its residents as set out by the provisions of the Canada Health Act of 1984. Alberta became Canada's second province (after Saskatchewan) to adopt a Tommy Douglas-style program in 1950, a precursor to the modern medicare system.
Alberta	717	Health care	Alberta's health care budget was $22.5 billion during the 2018–2019 fiscal year (approximately 45% of all government spending), making it the best-funded health-care system per-capita in Canada. Every hour the province spends more than $2.5 million, (or $60 million per day), to maintain and improve health care in the province.
Alberta	717	Health care	Notable health, education, research, and resources facilities in Alberta, all of which are located within Calgary or Edmonton. Health centres in Calgary include:
Alberta	717	Health care	Health centres in Edmonton include:
Alberta	717	Health care	The Edmonton Clinic complex, completed in 2012, provides a similar research, education, and care environment as the Mayo Clinic in the United States.
Alberta	717	Health care	All public health care services funded by the Government of Alberta are delivered operationally by Alberta Health Services. AHS is the province's single health authority, established on July 1, 2008, which replaced nine regional health authorities. AHS also funds all ground ambulance services in the province, as well as the province-wide Shock Trauma Air Rescue Service (STARS) air ambulance service.
Alberta	717	Transportation	Alberta is well-connected by air, with international airports in both Calgary and Edmonton. Calgary International Airport and Edmonton International Airport are the fourth- and fifth-busiest in Canada, respectively. Calgary's airport is a hub for WestJet Airlines and a regional hub for Air Canada, primarily serving the prairie provinces (Alberta, Saskatchewan and Manitoba) for connecting flights to British Columbia, eastern Canada, fifteen major United States centres, nine European airports, one Asian airport and four destinations in Mexico and the Caribbean. Edmonton's airport acts as a hub for the Canadian north and has connections to all major Canadian airports as well as airports in the United States, Europe, Mexico, and the Caribbean .
Alberta	717	Transportation	Calgary, Edmonton, Red Deer, Medicine Hat, and Lethbridge have substantial public transit systems. In addition to buses, Calgary and Edmonton operate light rail transit (LRT) systems. Edmonton LRT, which is underground in the downtown core and on the surface outside the downtown core was the first of the modern generation of light rail systems to be built in North America, while the Calgary C Train has one of the highest numbers of daily riders of any LRT system in North America.
Alberta	717	Transportation	There are more than 9,000 km (5,600 mi) of operating mainline railway in Alberta. The vast majority of this trackage is owned by the Canadian Pacific Kansas City (CPKC) and Canadian National Railway (CN) companies, which operate freight transport across the province. Additional railfreight service in the province is provided by two shortline railways: the Battle River Railway and Forty Mile Rail.
Alberta	717	Transportation	Passenger trains include Via Rail's Canadian (Toronto–Vancouver) and Jasper–Prince Rupert trains, which use the CN mainline and pass through Jasper National Park and parallel the Yellowhead Highway during at least part of their routes. The Rocky Mountaineer operates two sections: one from Vancouver to Banff over CP tracks, and a section that travels over CN tracks to Jasper.
Alberta	717	Transportation	Alberta has over 473,000 km (294,000 mi) of highways and roads in its road network, of which nearly 41,000 km (25,000 mi) are paved. The main north–south corridor is Highway 2, which begins south of Cardston at the Carway border crossing and is part of the CANAMEX Corridor. Beginning at the Coutts border crossing and ending at Lethbridge, Highway 4, effectively extends Interstate 15 into Alberta and is the busiest United States gateway to the province. Highway 3 joins Lethbridge to Fort Macleod and links Highway 2 to Highway 4. Highway 2 travels north through Fort Macleod, Calgary, Red Deer, and Edmonton.
Alberta	717	Transportation	North of Edmonton, the highway continues to Athabasca, then northwesterly along the south shore of Lesser Slave Lake into High Prairie, north to Peace River, west to Fairview and finally south to Grande Prairie, where it ends at an interchange with Highway 43. The section of Highway 2 between Calgary and Edmonton has been named the Queen Elizabeth II Highway to commemorate the visit of the monarch in 2005. Highway 2 is supplemented by two more highways that run parallel to it: Highway 22, west of Highway 2, known as Cowboy Trail, and Highway 21, east of Highway 2. Highway 43 travels northwest into Grande Prairie and the Peace River Country. Travelling northeast from Edmonton, the Highway 63 connects to Fort McMurrayand the Athabasca oil sands.
Alberta	717	Transportation	Alberta has two main east–west corridors. The southern corridor, part of the Trans-Canada Highway system, enters the province near Medicine Hat, runs westward through Calgary, and leaves Alberta through Banff National Park. The northern corridor, also part of the Trans-Canada network and known as the Yellowhead Highway (Highway 16), runs west from Lloydminster in eastern Alberta, through Edmonton and Jasper National Park into British Columbia. One of the most scenic drives is along the Icefields Parkway, which runs for 228 km (142 mi) between Jasper and Lake Louise, with mountain ranges and glaciers on either side of its entire length. A third corridor stretches across southern Alberta; Highway 3 runs between Crowsnest Pass and Medicine Hat through Lethbridge and forms the eastern portion of the Crowsnest Highway. Another major corridor through central Alberta is Highway 11 (also known as the David Thompson Highway), which runs east from the Saskatchewan River Crossing in Banff National Park through Rocky Mountain House and Red Deer, connecting with Highway 12, 20 km (12 mi) west of Stettler. The highway connects many of the smaller towns in central Alberta with Calgary and Edmonton, as it crosses Highway 2 just west of Red Deer.
Alberta	717	Transportation	Urban stretches of Alberta's major highways and freeways are often called trails. For example, Highway 2, the main north–south highway in the province, is called Deerfoot Trail as it passes through Calgary but becomes Calgary Trail (southbound) and Gateway Boulevard (northbound) as it enters Edmonton and then turns into St. Albert Trail as it leaves Edmonton for the City of St. Albert. Calgary, in particular, has a tradition of calling its largest urban expressways trails and naming many of them after prominent First Nations individuals and tribes, such as Crowchild Trail, Deerfoot Trail, and Stoney Trail.
Alberta	717	Friendship partners	Alberta has relationships with many provinces, states, and other entities worldwide.
Actinopterygii	734		Actinopterygii (/ˌæktɪnɒptəˈrɪdʒiaɪ/; from actino- 'having rays', and Ancient Greek πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webs of skin supported by radially extended bony spines, as opposed to the bulkier, fleshy lobed fins of the sister class Sarcopterygii (lobe-finned fish). Resembling folding fans, the actinopterygian fins can change shape and wetted area easily, providing superior thrust-to-weight ratios per movement compared to sarcopterygian and chondrichthyian fins. The fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the articulation between these fins and the internal skeleton (e.g., pelvic and pectoral girdles).
Actinopterygii	734		The vast majority (~99%) of actinopterygians are teleosts. By species count, they dominate the subphylum Vertebrata, and constitute nearly 99% of the over 30,000 extant species of fish. They are the most abundant nektonic aquatic animals and are ubiquitous throughout freshwater and marine environments from the deep sea to subterranean waters to the highest mountain streams. Extant species can range in size from Paedocypris, at 8 mm (0.3 in); to the massive ocean sunfish, at 2,300 kg (5,070 lb); and to the long-bodied oarfish, at 11 m (36 ft).
Actinopterygii	734	Characteristics	Ray-finned fishes occur in many variant forms. The main features of typical ray-finned fish are shown in the adjacent diagram. The swim bladder is a more derived structure than the lung and used for buoyancy. Except from the bichirs, which just like the Sarcopterygii (lobe-finned fish) have retained the ancestral condition of ventrally budding lungs, the swim bladder in ray-finned fishes derives from a dorsal bud above the foregut. In early forms the swim bladder could still be used for breathing, a trait still present in Holostei (bowfins and gars). In some fish, like the arapaima, the swim bladder has been modified for breathing air again, and in other lineages it have been completely lost.
Actinopterygii	734	Characteristics	Ray-finned fishes have many different types of scales; but all teleosts have leptoid scales. The outer part of these scales fan out with bony ridges, while the inner part is crossed with fibrous connective tissue. Leptoid scales are thinner and more transparent than other types of scales, and lack the hardened enamel or dentine-like layers found in the scales of many other fish. Unlike ganoid scales, which are found in non-teleost actinopterygians, new scales are added in concentric layers as the fish grows.
Actinopterygii	734	Characteristics	Teleosts also differ from other ray-finned fishes in having gone through a whole-genome duplication (paleopolyploidy).
Actinopterygii	734	Body shapes and fin arrangements	Ray-finned fish vary in size and shape, in their feeding specializations, and in the number and arrangement of their ray-fins.
Actinopterygii	734	Reproduction	In nearly all ray-finned fish, the sexes are separate, and in most species the females spawn eggs that are fertilized externally, typically with the male inseminating the eggs after they are laid. Development then proceeds with a free-swimming larval stage. However other patterns of ontogeny exist, with one of the commonest being sequential hermaphroditism. In most cases this involves protogyny, fish starting life as females and converting to males at some stage, triggered by some internal or external factor. Protandry, where a fish converts from male to female, is much less common than protogyny.
Actinopterygii	734	Reproduction	Most families use external rather than internal fertilization. Of the oviparous teleosts, most (79%) do not provide parental care. Viviparity, ovoviviparity, or some form of parental care for eggs, whether by the male, the female, or both parents is seen in a significant fraction (21%) of the 422 teleost families; no care is likely the ancestral condition. The oldest case of viviparity in ray-finned fish is found in Middle Triassic species of †Saurichthys. Viviparity is relatively rare and is found in about 6% of living teleost species; male care is far more common than female care. Male territoriality "preadapts" a species for evolving male parental care.
Actinopterygii	734	Reproduction	There are a few examples of fish that self-fertilise. The mangrove rivulus is an amphibious, simultaneous hermaphrodite, producing both eggs and spawn and having internal fertilisation. This mode of reproduction may be related to the fish's habit of spending long periods out of water in the mangrove forests it inhabits. Males are occasionally produced at temperatures below 19 °C (66 °F) and can fertilise eggs that are then spawned by the female. This maintains genetic variability in a species that is otherwise highly inbred.
Actinopterygii	734	Classification and fossil record	Actinopterygii is divided into the classes Cladistia and Actinopteri. The latter comprises the subclasses Chondrostei and Neopterygii. The Neopterygii, in turn, is divided into the infraclasses Holostei and Teleostei. During the Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic the teleosts in particular diversified widely. As a result, 96% of living fish species are teleosts (40% of all fish species belong to the teleost subgroup Acanthomorpha), while all other groups of actinopterygians represent depauperate lineages.
Actinopterygii	734	Classification and fossil record	The classification of ray-finned fishes can be summarized as follows:
Actinopterygii	734	Classification and fossil record	The cladogram below shows the main clades of living actinopterygians and their evolutionary relationships to other extant groups of fishes and the four-limbed vertebrates (tetrapods). The latter include mostly terrestrial species but also groups that became secondarily aquatic (e.g. Whales and Dolphins). Tetrapods evolved from a group of bony fish during the Devonian period. Approximate divergence dates for the different actinopterygian clades (in millions of years, mya) are from Near et al., 2012.
Actinopterygii	734	Classification and fossil record	The polypterids (bichirs and reedfish) are the sister lineage of all other actinopterygians, the Acipenseriformes (sturgeons and paddlefishes) are the sister lineage of Neopterygii, and Holostei (bowfin and gars) are the sister lineage of teleosts. The Elopomorpha (eels and tarpons) appear to be the most basal teleosts.
Actinopterygii	734	Classification and fossil record	The earliest known fossil actinopterygian is Andreolepis hedei, dating back 420 million years (Late Silurian), remains of which have been found in Russia, Sweden, and Estonia. Crown group actinopterygians most likely originated near the Devonian-Carboniferous boundary. The earliest fossil relatives of modern teleosts are from the Triassic period (Prohalecites, Pholidophorus), although it is suspected that teleosts originated already during the Paleozoic Era.
Actinopterygii	734	Classification and fossil record	The listing below is a summary of all extinct (indicated by a dagger, †) and living groups of Actinopterygii with their respective taxonomic rank. The taxonomy follows Phylogenetic Classification of Bony Fishes with notes when this differs from Nelson, ITIS and FishBase and extinct groups from Van der Laan 2016 and Xu 2021.
Albert Einstein	736		Albert Einstein (/ˈaɪnstaɪn/ EYEN-styne; German: [ˈalbɛɐt ˈʔaɪnʃtaɪn] ; 14 March 1879 – 18 April 1955) was a German-born theoretical physicist who is widely held to be one of the greatest and most influential scientists of all time. Best known for developing the theory of relativity, Einstein also made important contributions to quantum mechanics, and was thus a central figure in the revolutionary reshaping of the scientific understanding of nature that modern physics accomplished in the first decades of the twentieth century. His mass–energy equivalence formula E = mc, which arises from relativity theory, has been called "the world's most famous equation". He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory. His work is also known for its influence on the philosophy of science. In a 1999 poll of 130 leading physicists worldwide by the British journal Physics World, Einstein was ranked the greatest physicist of all time. His intellectual achievements and originality have made the word Einstein broadly synonymous with genius.
Albert Einstein	736		In 1905, a year sometimes described as his annus mirabilis (miracle year), Einstein published four groundbreaking papers. These outlined a theory of the photoelectric effect, explained Brownian motion, introduced his special theory of relativity—a theory which addressed the inability of classical mechanics to account satisfactorily for the behavior of the electromagnetic field—and demonstrated that if the special theory is correct, mass and energy are equivalent to each other. In 1915, he proposed a general theory of relativity that extended his system of mechanics to incorporate gravitation. A cosmological paper that he published the following year laid out the implications of general relativity for the modeling of the structure and evolution of the universe as a whole. The middle part of his career also saw him making important contributions to statistical mechanics and quantum theory. Especially notable was his work on the quantum physics of radiation, in which light consists of particles, subsequently called photons.
Albert Einstein	736		For much of the last phase of his academic life, Einstein worked on two endeavors that proved ultimately unsuccessful. Firstly, he fought a long rearguard action against quantum theory's introduction of fundamental randomness into science's picture of the world, objecting that "God does not play dice". Secondly, he attempted to devise a unified field theory by generalizing his geometric theory of gravitation to include electromagnetism too. As a result, he became increasingly isolated from the mainstream of modern physics.
Albert Einstein	736		Born in the German Empire, Einstein moved to Switzerland in 1895, forsaking his German citizenship (as a subject of the Kingdom of Württemberg) the following year. In 1897, at the age of seventeen, he enrolled in the mathematics and physics teaching diploma program at the Swiss Federal polytechnic school in Zürich, graduating in 1900. In 1901, he acquired Swiss citizenship, which he kept for the rest of his life. In 1903, he secured a permanent position at the Swiss Patent Office in Bern. In 1905, he submitted a successful PhD dissertation to the University of Zurich. In 1914, he moved to Berlin in order to join the Prussian Academy of Sciences and the Humboldt University of Berlin. In 1917, he became director of the Kaiser Wilhelm Institute for Physics; he also became a German citizen again, this time as a subject of the Kingdom of Prussia. In 1933, while he was visiting the United States, Adolf Hitler came to power in Germany. Horrified by the Nazi "war of extermination" against his fellow Jews, Einstein decided to remain in the US, and was granted American citizenship in 1940. On the eve of World War II, he endorsed a letter to President Franklin D. Roosevelt alerting him to the potential German nuclear weapons program and recommending that the US begin similar research. Einstein supported the Allies but generally viewed the idea of nuclear weapons with great dismay.
Albert Einstein	736	Life and career	Albert Einstein was born in Ulm, in the Kingdom of Württemberg in the German Empire, on 14 March 1879. His parents, secular Ashkenazi Jews, were Hermann Einstein, a salesman and engineer, and Pauline Koch. In 1880, the family moved to Munich, where Einstein's father and his uncle Jakob founded Elektrotechnische Fabrik J. Einstein & Cie, a company that manufactured electrical equipment based on direct current.
Albert Einstein	736	Life and career	Albert attended a Catholic elementary school in Munich from the age of five. When he was eight, he was transferred to the Luitpold-Gymnasium (now known as the Albert-Einstein-Gymnasium) where he received advanced primary and then secondary school education.
Albert Einstein	736	Life and career	In 1894, Hermann and Jakob's company tendered for a contract to install electric lighting in Munich, but without success—they lacked the capital that would have been required to update their technology from direct current to the more efficient, alternating current alternative. The failure of their bid forced them to sell their Munich factory and search for new opportunities elsewhere. The Einstein family moved to Italy, first to Milan and a few months later to Pavia, where they settled in Palazzo Cornazzani. Einstein, then fifteen, stayed behind in Munich in order to finish his schooling. His father wanted him to study electrical engineering, but he was a fractious pupil who found the Gymnasium's regimen and teaching methods far from congenial. He later wrote that the school's policy of strict rote learning was harmful to creativity. At the end of December 1894, a letter from a doctor persuaded the Luitpold's authorities to release him from its care, and he joined his family in Pavia. While in Italy as a teenager, he wrote an essay entitled "On the Investigation of the State of the Ether in a Magnetic Field".
Albert Einstein	736	Life and career	Einstein excelled at physics and mathematics from an early age, and soon acquired the mathematical expertise normally only found in a child several years his senior. He began teaching himself algebra, calculus and Euclidean geometry when he was twelve; he made such rapid progress that he discovered an original proof of the Pythagorean theorem before his thirteenth birthday. A family tutor, Max Talmud, said that only a short time after he had given the twelve year old Einstein a geometry textbook, the boy "had worked through the whole book. He thereupon devoted himself to higher mathematics ... Soon the flight of his mathematical genius was so high I could not follow." Einstein recorded that he had "mastered integral and differential calculus" while still just fourteen. His love of algebra and geometry was so great that at twelve, he was already confident that nature could be understood as a "mathematical structure".
Albert Einstein	736	Life and career	At thirteen, when his range of enthusiasms had broadened to include music and philosophy, Einstein was introduced to Kant's Critique of Pure Reason. Kant became his favorite philosopher; according to his tutor, "At the time he was still a child, only thirteen years old, yet Kant's works, incomprehensible to ordinary mortals, seemed to be clear to him."
Albert Einstein	736	Life and career	In 1895, at the age of sixteen, Einstein sat the entrance examination for the Federal polytechnic school (later the Eidgenössische Technische Hochschule, ETH) in Zürich, Switzerland. He failed to reach the required standard in the general part of the test, but performed with distinction in physics and mathematics. On the advice of the polytechnic's principal, he completed his secondary education at the Argovian cantonal school (a gymnasium) in Aarau, Switzerland, graduating in 1896. While lodging in Aarau with the family of Jost Winteler, he fell in love with Winteler's daughter, Marie. (His sister, Maja, later married Winteler's son Paul.)
Albert Einstein	736	Life and career	In January 1896, with his father's approval, Einstein renounced his citizenship of the German Kingdom of Württemberg in order to avoid conscription into military service. The Matura (graduation for the successful completion of higher secondary schooling) awarded to him in the September of that year acknowledged him to have performed well across most of the curriculum, allotting him a top grade of 6 for history, physics, algebra, geometry, and descriptive geometry. At seventeen, he enrolled in the four-year mathematics and physics teaching diploma program at the Federal polytechnic school. Marie Winteler, a year older than him, took up a teaching post in Olsberg, Switzerland.
Albert Einstein	736	Life and career	The five other polytechnic school freshmen following the same course as Einstein included just one woman, a twenty year old Serbian, Mileva Marić. Over the next few years, the pair spent many hours discussing their shared interests and learning about topics in physics that the polytechnic school's lectures did not cover. In his letters to Marić, Einstein confessed that exploring science with her by his side was much more enjoyable than reading a textbook in solitude. Eventually the two students became not only friends but also lovers.
Albert Einstein	736	Life and career	Historians of physics are divided on the question of the extent to which Marić contributed to the insights of Einstein's annus mirabilis publications. There is at least some evidence that he was influenced by her scientific ideas, but there are scholars who doubt whether her impact on his thought was of any great significance at all.
Albert Einstein	736	Life and career	Correspondence between Einstein and Marić, discovered and published in 1987, revealed that in early 1902, while Marić was visiting her parents in Novi Sad, she gave birth to a daughter, Lieserl. When Marić returned to Switzerland it was without the child, whose fate is uncertain. A letter of Einstein's that he wrote in September 1903 suggests that the girl was either given up for adoption or died of scarlet fever in infancy.
Albert Einstein	736	Life and career	Einstein and Marić married in January 1903. In May 1904, their son Hans Albert was born in Bern, Switzerland. Their son Eduard was born in Zürich in July 1910. In letters that Einstein wrote to Marie Winteler in the months before Eduard's arrival, he described his love for his wife as "misguided" and mourned the "missed life" that he imagined he would have enjoyed if he had married Winteler instead: "I think of you in heartfelt love every spare minute and am so unhappy as only a man can be."
Albert Einstein	736	Life and career	In 1912, Einstein entered into a relationship with Elsa Löwenthal, who was both his first cousin on his mother's side and his second cousin on his father's. When Marić learned of his infidelity soon after moving to Berlin with him in April 1914, she returned to Zürich, taking Hans Albert and Eduard with her. Einstein and Marić were granted a divorce on 14 February 1919 on the grounds of having lived apart for five years. As part of the divorce settlement, Einstein agreed that if he were to win a Nobel Prize, he would give the money that he received to Marić; she had to wait only two years before her foresight in extracting this promise from him was rewarded.
Albert Einstein	736	Life and career	Einstein married Löwenthal in 1919. In 1923, he began a relationship with a secretary named Betty Neumann, the niece of his close friend Hans Mühsam. Löwenthal nevertheless remained loyal to him, accompanying him when he emigrated to the United States in 1933. In 1935, she was diagnosed with heart and kidney problems. She died in December 1936.
Albert Einstein	736	Life and career	A volume of Einstein's letters released by Hebrew University of Jerusalem in 2006 added further names to the catalog of women with whom he was romantically involved. They included Margarete Lebach (a blonde Austrian), Estella Katzenellenbogen (the rich owner of a florist business), Toni Mendel (a wealthy Jewish widow) and Ethel Michanowski (a Berlin socialite), with whom he spent time and from whom he accepted gifts while married to Löwenthal. After being widowed, Einstein was briefly in a relationship with Margarita Konenkova, thought by some to be a Russian spy; her husband, the Russian sculptor Sergei Konenkov, created the bronze bust of Einstein at the Institute for Advanced Study at Princeton.
Albert Einstein	736	Life and career	Following an episode of acute mental illness at about the age of twenty, Einstein's son Eduard was diagnosed with schizophrenia. He spent the remainder of his life either in the care of his mother or in temporary confinement in an asylum. After her death, he was committed permanently to Burghölzli, the Psychiatric University Hospital in Zürich.
Albert Einstein	736	Life and career	Einstein graduated from the Federal polytechnic school in 1900, duly certified as competent to teach mathematics and physics. His successful acquisition of Swiss citizenship in February 1901 was not followed by the usual sequel of conscription; the Swiss authorities deemed him medically unfit for military service. He found that Swiss schools too appeared to have no use for him, failing to offer him a teaching position despite the almost two years that he spent applying for one. Eventually it was with the help of Marcel Grossmann's father that he secured a post in Bern at the Swiss Patent Office, as an assistant examiner – level III.
Albert Einstein	736	Life and career	Patent applications that landed on Einstein's desk for his evaluation included ideas for a gravel sorter and an electric typewriter. His employers were pleased enough with his work to make his position permanent in 1903, although they did not think that he should be promoted until he had "fully mastered machine technology". It is conceivable that his labors at the patent office had a bearing on his development of his special theory of relativity. He arrived at his revolutionary ideas about space, time and light through thought experiments about the transmission of signals and the synchronization of clocks, matters which also figured in some of the inventions submitted to him for assessment.
Albert Einstein	736	Life and career	In 1902, Einstein and some friends whom he had met in Bern formed a group that held regular meetings to discuss science and philosophy. Their choice of a name for their club, the Olympia Academy, was an ironic comment upon its far from Olympian status. Sometimes they were joined by Marić, who limited her participation in their proceedings to careful listening. The thinkers whose works they reflected upon included Henri Poincaré, Ernst Mach and David Hume, all of whom significantly influenced Einstein's own subsequent ideas and beliefs.
Albert Einstein	736	Life and career	Einstein's first paper, "Folgerungen aus den Capillaritätserscheinungen" ("Conclusions drawn from the phenomena of capillarity"), in which he proposed a model of intermolecular attraction that he afterwards disavowed as worthless, was published in the journal Annalen der Physik in 1900. His 24-page doctoral dissertation also addressed a topic in molecular physics. Titled "Eine neue Bestimmung der Moleküldimensionen" ("A New Determination of Molecular Dimensions") and dedicated to his friend Marcel Grossman, it was completed on 30 April 1905 and approved by Professor Alfred Kleiner of the University of Zurich three months later. (Einstein was formally awarded his PhD on 15 January 1906.) Four other pieces of work that Einstein completed in 1905—his famous papers on the photoelectric effect, Brownian motion, his special theory of relativity and the equivalence of mass and energy—have led to the year's being celebrated as an annus mirabilis for physics almost as wonderful as 1666 (the year in which Isaac Newton experienced his greatest epiphanies). The publications deeply impressed Einstein's contemporaries.
Albert Einstein	736	Life and career	Einstein's sabbatical as a civil servant approached its end in 1908, when he secured a junior teaching position at the University of Bern. In 1909, a lecture on relativistic electrodynamics that he gave at the University of Zurich, much admired by Alfred Kleiner, led to Zürich's luring him away from Bern with a newly created associate professorship. Promotion to a full professorship followed in April 1911, when he accepted a chair at the German Charles-Ferdinand University in Prague, a move which required him to become an Austrian citizen of the Austro-Hungarian Empire. His time in Prague saw him producing eleven research papers.
Albert Einstein	736	Life and career	In July 1912, he returned to his alma mater, the ETH Zurich, to take up a chair in theoretical physics. His teaching activities there centred on thermodynamics and analytical mechanics, and his research interests included the molecular theory of heat, continuum mechanics and the development of a relativistic theory of gravitation. In his work on the latter topic, he was assisted by his friend, Marcel Grossmann, whose knowledge of the kind of mathematics required was greater than his own.
Albert Einstein	736	Life and career	In the spring of 1913, two German visitors, Max Planck and Walther Nernst, called upon Einstein in Zürich in the hope of persuading him to relocate to Berlin. They offered him membership of the Prussian Academy of Sciences, the directorship of the planned Kaiser Wilhelm Institute for Physics and a chair at the Humboldt University of Berlin that would allow him to pursue his research supported by a professorial salary but with no teaching duties to burden him. Their invitation was all the more appealing to him because Berlin happened to be the home of his latest girlfriend, Elsa Löwenthal. He duly joined the Academy on 24 July 1913, and moved into an apartment in the Berlin district of Dahlem on 1 April 1914. He was installed in his Humboldt University position shortly thereafter.
Albert Einstein	736	Life and career	The outbreak of the First World War in July 1914 marked the beginning of Einstein's gradual estrangement from the nation of his birth. When the "Manifesto of the Ninety-Three" was published in October 1914—a document signed by a host of prominent German thinkers that justified Germany's belligerence—Einstein was one of the few German intellectuals to distance himself from it and sign the alternative, eirenic "Manifesto to the Europeans" instead. But this expression of his doubts about German policy did not prevent him from being elected to a two-year term as president of the German Physical Society in 1916. And when the Kaiser Wilhelm Institute for Physics opened its doors the following year—its foundation delayed because of the war—Einstein was appointed its first director, just as Planck and Nernst had promised.
Albert Einstein	736	Life and career	Einstein was elected a Foreign Member of the Royal Netherlands Academy of Arts and Sciences in 1920, and a Foreign Member of the Royal Society in 1921. In 1922, he was awarded the 1921 Nobel Prize in Physics "for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect". At this point some physicists still regarded the general theory of relativity sceptically, and the Nobel citation displayed a degree of doubt even about the work on photoelectricity that it acknowledged: it did not assent to Einstein's notion of the particulate nature of light, which only won over the entire scientific community when S. N. Bose derived the Planck spectrum in 1924. That same year, Einstein was elected an International Honorary Member of the American Academy of Arts and Sciences. Britain's closest equivalent of the Nobel award, the Royal Society's Copley Medal, was not hung around Einstein's neck until 1925. He was elected an International Member of the American Philosophical Society in 1930.
Albert Einstein	736	Life and career	Einstein resigned from the Prussian Academy in March 1933. His accomplishments in Berlin had included the completion of the general theory of relativity, proving the Einstein–de Haas effect, contributing to the quantum theory of radiation, and the development of Bose–Einstein statistics.
Albert Einstein	736	Life and career	In 1907, Einstein reached a milestone on his long journey from his special theory of relativity to a new idea of gravitation with the formulation of his equivalence principle, which asserts that an observer in an infinitesimally small box falling freely in a gravitational field would be unable to find any evidence that the field exists. In 1911, he used the principle to estimate the amount by which a ray of light from a distant star would be bent by the gravitational pull of the Sun as it passed close to the Sun's photosphere (that is, the Sun's apparent surface). He reworked his calculation in 1913, having now found a way to model gravitation with the Riemann curvature tensor of a non-Euclidean four-dimensional spacetime. By the fall of 1915, his reimagining of the mathematics of gravitation in terms of Riemannian geometry was complete, and he applied his new theory not just to the behavior of the Sun as a gravitational lens but also to another astronomical phenomenon, the precession of the perihelion of Mercury (a slow drift in the point in Mercury's elliptical orbit at which it approaches the Sun most closely). A total eclipse of the Sun that took place on 29 May 1919 provided an opportunity to put his theory of gravitational lensing to the test, and observations performed by Sir Arthur Eddington yielded results that were consistent with his calculations. Eddington's work was reported at length in newspapers around the world. On 7 November 1919, for example, the leading British newspaper, The Times, printed a banner headline that read: "Revolution in Science – New Theory of the Universe – Newtonian Ideas Overthrown".
Albert Einstein	736	Life and career	With Eddington's eclipse observations widely reported not just in academic journals but by the popular press as well, Einstein became "perhaps the world's first celebrity scientist", a genius who had shattered a paradigm that had been basic to physicists' understanding of the universe since the seventeenth century.
Albert Einstein	736	Life and career	Einstein began his new life as an intellectual icon in America, where he arrived on 2 April 1921. He was welcomed to New York City by Mayor John Francis Hylan, and then spent three weeks giving lectures and attending receptions. He spoke several times at Columbia University and Princeton, and in Washington, he visited the White House with representatives of the National Academy of Sciences. He returned to Europe via London, where he was the guest of the philosopher and statesman Viscount Haldane. He used his time in the British capital to meet several people prominent in British scientific, political or intellectual life, and to deliver a lecture at King's College. In July 1921, he published an essay, "My First Impression of the U.S.A.", in which he sought to sketch the American character, much as had Alexis de Tocqueville in Democracy in America (1835). He wrote of his transatlantic hosts in highly approving terms: "What strikes a visitor is the joyous, positive attitude to life ... The American is friendly, self-confident, optimistic, and without envy."
Albert Einstein	736	Life and career	In 1922, Einstein's travels were to the old world rather than the new. He devoted six months to a tour of Asia that saw him speaking in Japan, Singapore and Sri Lanka (then known as Ceylon). After his first public lecture in Tokyo, he met Emperor Yoshihito and his wife at the Imperial Palace, with thousands of spectators thronging the streets in the hope of catching a glimpse of him. (In a letter to his sons, he wrote that Japanese people seemed to him to be generally modest, intelligent and considerate, and to have a true appreciation of art. But his picture of them in his diary was less flattering: "[the] intellectual needs of this nation seem to be weaker than their artistic ones – natural disposition?" His journal also contains views of China and India which were uncomplimentary. Of Chinese people, he wrote that "even the children are spiritless and look obtuse... It would be a pity if these Chinese supplant all other races. For the likes of us the mere thought is unspeakably dreary".) He was greeted with even greater enthusiasm on the last leg of his tour, in which he spent twelve days in Mandatory Palestine, newly entrusted to British rule by the League of Nations in the aftermath of the First World War. Sir Herbert Samuel, the British High Commissioner, welcomed him with a degree of ceremony normally only accorded to a visiting head of state, including a cannon salute. One reception held in his honor was stormed by people determined to hear him speak: he told them that he was happy that Jews were beginning to be recognized as a force in the world.
Albert Einstein	736	Life and career	Einstein's decision to tour the eastern hemisphere in 1922 meant that he was unable to go to Stockholm in the December of that year to participate in the Nobel prize ceremony. His place at the traditional Nobel banquet was taken by a German diplomat, who gave a speech praising him not only as a physicist but also as a campaigner for peace. A two week visit to Spain that he undertook in 1923 saw him collecting another award, a membership of the Spanish Academy of Sciences signified by a diploma handed to him by King Alfonso XIII. (His Spanish trip also gave him a chance to meet a fellow Nobel laureate, the neuroanatomist Santiago Ramón y Cajal.)
Albert Einstein	736	Life and career	From 1922 until 1932, with the exception of a few months in 1923 and 1924, Einstein was a member of the Geneva-based International Committee on Intellectual Cooperation of the League of Nations, a group set up by the League to encourage scientists, artists, scholars, teachers and other people engaged in the life of the mind to work more closely with their counterparts in other countries. He was appointed as a German delegate rather than as a representative of Switzerland because of the machinations of two Catholic activists, Oskar Halecki and Giuseppe Motta. By persuading Secretary General Eric Drummond to deny Einstein the place on the committee reserved for a Swiss thinker, they created an opening for Gonzague de Reynold, who used his League of Nations position as a platform from which to promote traditional Catholic doctrine. Einstein's former physics professor Hendrik Lorentz and the Polish chemist Marie Curie were also members of the committee.
Albert Einstein	736	Life and career	In March and April 1925, Einstein and his wife visited South America, where they spent about a week in Brazil, a week in Uruguay and a month in Argentina. Their tour was suggested by Jorge Duclout (1856–1927) and Mauricio Nirenstein (1877–1935) with the support of several Argentine scholars, including Julio Rey Pastor, Jakob Laub, and Leopoldo Lugones. and was financed primarily by the Council of the University of Buenos Aires and the Asociación Hebraica Argentina (Argentine Hebraic Association) with a smaller contribution from the Argentine-Germanic Cultural Institution.
Albert Einstein	736	Life and career	In December 1930, Einstein began another significant sojourn in the United States, drawn back to the US by the offer of a two month research fellowship at the California Institute of Technology. Caltech supported him in his wish that he should not be exposed to quite as much attention from the media as he had experienced when visiting the US in 1921, and he therefore declined all the invitations to receive prizes or make speeches that his admirers poured down upon him. But he remained willing to allow his fans at least some of the time with him that they requested.
Albert Einstein	736	Life and career	After arriving in New York City, Einstein was taken to various places and events, including Chinatown, a lunch with the editors of The New York Times, and a performance of Carmen at the Metropolitan Opera, where he was cheered by the audience on his arrival. During the days following, he was given the keys to the city by Mayor Jimmy Walker and met Nicholas Murray Butler, the president of Columbia University, who described Einstein as "the ruling monarch of the mind". Harry Emerson Fosdick, pastor at New York's Riverside Church, gave Einstein a tour of the church and showed him a full-size statue that the church made of Einstein, standing at the entrance. Also during his stay in New York, he joined a crowd of 15,000 people at Madison Square Garden during a Hanukkah celebration.
Albert Einstein	736	Life and career	Einstein next traveled to California, where he met Caltech president and Nobel laureate Robert A. Millikan. His friendship with Millikan was "awkward", as Millikan "had a penchant for patriotic militarism", where Einstein was a pronounced pacifist. During an address to Caltech's students, Einstein noted that science was often inclined to do more harm than good.
Albert Einstein	736	Life and career	This aversion to war also led Einstein to befriend author Upton Sinclair and film star Charlie Chaplin, both noted for their pacifism. Carl Laemmle, head of Universal Studios, gave Einstein a tour of his studio and introduced him to Chaplin. They had an instant rapport, with Chaplin inviting Einstein and his wife, Elsa, to his home for dinner. Chaplin said Einstein's outward persona, calm and gentle, seemed to conceal a "highly emotional temperament", from which came his "extraordinary intellectual energy".
Albert Einstein	736	Life and career	Chaplin's film, City Lights, was to premiere a few days later in Hollywood, and Chaplin invited Einstein and Elsa to join him as his special guests. Walter Isaacson, Einstein's biographer, described this as "one of the most memorable scenes in the new era of celebrity". Chaplin visited Einstein at his home on a later trip to Berlin and recalled his "modest little flat" and the piano at which he had begun writing his theory. Chaplin speculated that it was "possibly used as kindling wood by the Nazis".
Albert Einstein	736	Life and career	In February 1933, while on a visit to the United States, Einstein knew he could not return to Germany with the rise to power of the Nazis under Germany's new chancellor, Adolf Hitler.
Albert Einstein	736	Life and career	While at American universities in early 1933, he undertook his third two-month visiting professorship at the California Institute of Technology in Pasadena. In February and March 1933, the Gestapo repeatedly raided his family's apartment in Berlin. He and his wife Elsa returned to Europe in March, and during the trip, they learned that the German Reichstag had passed the Enabling Act on 23 March, transforming Hitler's government into a de facto legal dictatorship, and that they would not be able to proceed to Berlin. Later on, they heard that their cottage had been raided by the Nazis and Einstein's personal sailboat confiscated. Upon landing in Antwerp, Belgium on 28 March, Einstein immediately went to the German consulate and surrendered his passport, formally renouncing his German citizenship. The Nazis later sold his boat and converted his cottage into a Hitler Youth camp.
Albert Einstein	736	Life and career	In April 1933, Einstein discovered that the new German government had passed laws barring Jews from holding any official positions, including teaching at universities. Historian Gerald Holton describes how, with "virtually no audible protest being raised by their colleagues", thousands of Jewish scientists were suddenly forced to give up their university positions and their names were removed from the rolls of institutions where they were employed.
Albert Einstein	736	Life and career	A month later, Einstein's works were among those targeted by the German Student Union in the Nazi book burnings, with Nazi propaganda minister Joseph Goebbels proclaiming, "Jewish intellectualism is dead." One German magazine included him in a list of enemies of the German regime with the phrase, "not yet hanged", offering a $5,000 bounty on his head. In a subsequent letter to physicist and friend Max Born, who had already emigrated from Germany to England, Einstein wrote, "... I must confess that the degree of their brutality and cowardice came as something of a surprise." After moving to the US, he described the book burnings as a "spontaneous emotional outburst" by those who "shun popular enlightenment", and "more than anything else in the world, fear the influence of men of intellectual independence".
Albert Einstein	736	Life and career	Einstein was now without a permanent home, unsure where he would live and work, and equally worried about the fate of countless other scientists still in Germany. Aided by the Academic Assistance Council, founded in April 1933 by British Liberal politician William Beveridge to help academics escape Nazi persecution, Einstein was able to leave Germany. He rented a house in De Haan, Belgium, where he lived for a few months. In late July 1933, he visited England for about six weeks at the invitation of the British Member of Parliament Commander Oliver Locker-Lampson, who had become friends with him in the preceding years. Locker-Lampson invited him to stay near his Cromer home in a secluded wooden cabin on Roughton Heath in the Parish of Roughton, Norfolk. To protect Einstein, Locker-Lampson had two bodyguards watch over him; a photo of them carrying shotguns and guarding Einstein was published in the Daily Herald on 24 July 1933.

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