Bronx High School of Science
The Bronx High School of Science is a public magnet, specialized high school in Bronx, New York, United States. It is operated by the New York City Department of Education. Admission to Bronx Science involves passing the Specialized High Schools Admissions Test; each November, about 30,000 eighth and ninth graders take the 3-hour test for admittance to eight of the nine specialized high schools. The test is competitive, with only 900 of the 30,000 applicants being accepted to Bronx Science each year. Founded in 1938 in the Bronx in New York City, Bronx Science is now situated in an educational area known as the Educational Mile in Bedford Park, a neighborhood in the northwest portion of the Bronx; the exam administered to students in the 8th grade was taken by more than 20,000 students every year as of 1999. Although known for its focus on mathematics and science, Bronx Science emphasizes the humanities and social sciences and continually attracts students with a wide variety of interests beyond math and science.
Its alumni have received eight Pulitzer Prizes. The Bronx High School of Science is referred to as Bronx Science, just Science, it was called Science High and its founder, Morris Meister, is said to have called the school as "The High School of Science." Bronx Science was founded in 1938 as a specialized science and math high school for boys, by resolution of the Board of Education of the City of New York, with Morris Meister as the first principal of the school. They were given use of an antiquated Gothic-gargoyled edifice located at Creston Avenue and 184th Street, in the Fordham Road-Grand Concourse area of the Bronx; the building, built in 1918 for Evander Childs High School, had been successively occupied by Walton High School and by an annex of DeWitt Clinton High School. The initial faculty were composed in part by a contingent from Stuyvesant High School. Principal Meister put his imprint on the school from its formation, for example selecting as school colors "green to represent chlorophyll and gold the sun, both of which are essential to the chain of life."
Bronx Science started with about 150 ninth year students and 250 tenth year students, the remaining facilities of the building being used by DeWitt Clinton. As more boys began to attend Science, the Clinton contingent was returned to its own main building. During their joint occupation, which lasted for 2 years until 1940, the two schools had separate teaching staff and classes, but the same supervision and administration. In 1946, as a result of the efforts of Meister, the faculty, the Parents Association, the school became co-ed, giving girls of New York equal opportunity to pursue a quality education in a specialized high school denied to them; this expansion to co-education preceded its rivals Stuyvesant and Brooklyn Tech by more than two decades. In 1958, after 20 years as principal of the school, Morris Meister resigned to become the first president of the newly organized Bronx Community College. Mr. Meister selected a teacher, Alexander Taffel, to succeed him as principal. From the beginning, the Parents Association and Principal Morris Meister campaigned for a new building.
After twenty years, but under Principal Taffel, plans were completed for a new $8 million building, designed by the architectural firm of Emery Roth and Sons. The new building would be on 205th Street near Bedford Park Boulevard, in a predominantly institutional area, between DeWitt Clinton High School and its large football field on one side, Harris Field and Hunter College on the other. On March 3, 1959, students and faculty occupied the new building for the first time, solving the problem of how to move the books from the old library to the new in typical Bronx Science manner: on Friday afternoon each student took home five library books from the old building, on Monday returned them to the new one, they entered a school equipped with modern classrooms and technical studio areas. The main lobby entrance featured a 63-foot, Venetian glass mosaic mural overhead, depicting major figures from the history of science such as Marie Curie and Charles Darwin under the protective hands of a God-like figure representing knowledge, with this quote from John Dewey: "Every great advance in science has issued from a new audacity of imagination."
The mural is an original work by Frank J. Reilly entitled Humanities Protecting Biology, Chemistry. Legions of students over the years, bemoaning the lack of swimming facilities, have sarcastically referred to the mural as "the Science swimming pool", perpetuating the idea – apocryphal – that a choice was made to fund a mural rather than a pool in the new building; the move was not without incident. In the first spring of the move, rumors swept the school that various Bronx youth street gangs were coming to the school, that the Fordham Baldies would shave the hair of Science students; this never happened. Another incident did happen that spring: The first time Science girls appeared on the outdoor physical education field in gym clothes, some students from the neighboring, all-male DeWitt Clinton High School charged the separation fence between their field and the Science field; the fence held. When Bronx Science celebrated its silver anniversary in June 1963, President John F. Kennedy hailed it as "a significant and pathfinding example of a special program devoted to the development of the student gifted in science and mathematics."
The President had selected one of its graduates, Harold Brown, of the class of 1943, fo
University of California, Berkeley
The University of California, Berkeley is a public research university in Berkeley, California. It was founded in 1868 and serves as the flagship institution of the ten research universities affiliated with the University of California system. Berkeley has since grown to instruct over 40,000 students in 350 undergraduate and graduate degree programs covering numerous disciplines. Berkeley is one of the 14 founding members of the Association of American Universities, with $789 million in R&D expenditures in the fiscal year ending June 30, 2015. Today, Berkeley maintains close relationships with three United States Department of Energy National Laboratories—Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory and Los Alamos National Laboratory—and is home to many institutes, including the Mathematical Sciences Research Institute and the Space Sciences Laboratory. Through its partner institution University of California, San Francisco, Berkeley offers a joint medical program at the UCSF Medical Center.
As of October 2018, Berkeley alumni, faculty members and researchers include 107 Nobel laureates, 25 Turing Award winners, 14 Fields Medalists. They have won 9 Wolf Prizes, 45 MacArthur Fellowships, 20 Academy Awards, 14 Pulitzer Prizes and 207 Olympic medals. In 1930, Ernest Lawrence invented the cyclotron at Berkeley, based on which UC Berkeley researchers along with Berkeley Lab have discovered or co-discovered 16 chemical elements of the periodic table – more than any other university in the world. During the 1940s, Berkeley physicist J. R. Oppenheimer, the "Father of the Atomic Bomb," led the Manhattan project to create the first atomic bomb. In the 1960s, Berkeley was noted for the Free Speech Movement as well as the Anti-Vietnam War Movement led by its students. In the 21st century, Berkeley has become one of the leading universities in producing entrepreneurs and its alumni have founded a large number of companies worldwide. Berkeley is ranked among the top 20 universities in the world by the Academic Ranking of World Universities, the Times Higher Education World University Rankings, the U.
S. News & World Report Global University Rankings, it is considered one of the "Public Ivies", meaning that it is a public university thought to offer a quality of education comparable to that of the Ivy League. In 1866, the private College of California purchased the land comprising the current Berkeley campus in order to re-sell it in subdivided lots to raise funds; the effort failed to raise the necessary funds, so the private college merged with the state-run Agricultural and Mechanical Arts College to form the University of California, the first full-curriculum public university in the state. Upon its founding, The Dwinelle Bill stated that the "University shall have for its design, to provide instruction and thorough and complete education in all departments of science and art, industrial and professional pursuits, general education, special courses of instruction in preparation for the professions". Ten faculty members and 40 students made up the new University of California when it opened in Oakland in 1869.
Frederick H. Billings was a trustee of the College of California and suggested that the new site for the college north of Oakland be named in honor of the Anglo-Irish philosopher George Berkeley. In 1870, Henry Durant, the founder of the College of California, became the first president. With the completion of North and South Halls in 1873, the university relocated to its Berkeley location with 167 male and 22 female students where it held its first classes. Beginning in 1891, Phoebe Apperson Hearst made several large gifts to Berkeley, funding a number of programs and new buildings and sponsoring, in 1898, an international competition in Antwerp, where French architect Émile Bénard submitted the winning design for a campus master plan. In 1905, the University Farm was established near Sacramento becoming the University of California, Davis. In 1919, Los Angeles State Normal School became the southern branch of the University, which became University of California, Los Angeles. By 1920s, the number of campus buildings had grown and included twenty structures designed by architect John Galen Howard.
Robert Gordon Sproul served as president from 1930 to 1958. In the 1930s, Ernest Lawrence helped establish the Radiation Laboratory and invented the cyclotron, which won him the Nobel physics prize in 1939. Based on the cyclotron, UC Berkeley scientists and researchers, along with Berkeley Lab, went on to discover 16 chemical elements of the periodic table – more than any other university in the world. In particular, during World War II and following Glenn Seaborg's then-secret discovery of plutonium, Ernest Orlando Lawrence's Radiation Laboratory began to contract with the U. S. Army to develop the atomic bomb. UC Berkeley physics professor J. Robert Oppenheimer was named scientific head of the Manhattan Project in 1942. Along with the Lawrence Berkeley National Laboratory, Berkeley was a partner in managing two other labs, Los Alamos National Laboratory and Lawrence Livermore National Laboratory. By 1942, the American Council on Education ranked Berkeley second only to Harvard in the number of distinguished departments.
During the McCarthy era in 1949, the Board of Regents adopted an anti-communist loyalty oath. A number of faculty members led by Edward C. Tolman were dismissed. In 1952, the University of California became; each campus was give
The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process, it is by far the most important source of energy for life on Earth. Its diameter is about 1.39 million kilometers, or 109 times that of Earth, its mass is about 330,000 times that of Earth. It accounts for about 99.86% of the total mass of the Solar System. Three quarters of the Sun's mass consists of hydrogen; the Sun is a G-type main-sequence star based on its spectral class. As such, it is informally and not accurately referred to as a yellow dwarf, it formed 4.6 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud. Most of this matter gathered in the center, whereas the rest flattened into an orbiting disk that became the Solar System; the central mass became so hot and dense that it initiated nuclear fusion in its core. It is thought that all stars form by this process.
The Sun is middle-aged. It fuses about 600 million tons of hydrogen into helium every second, converting 4 million tons of matter into energy every second as a result; this energy, which can take between 10,000 and 170,000 years to escape from its core, is the source of the Sun's light and heat. In about 5 billion years, when hydrogen fusion in its core has diminished to the point at which the Sun is no longer in hydrostatic equilibrium, its core will undergo a marked increase in density and temperature while its outer layers expand to become a red giant, it is calculated that the Sun will become sufficiently large to engulf the current orbits of Mercury and Venus, render Earth uninhabitable. After this, it will shed its outer layers and become a dense type of cooling star known as a white dwarf, no longer produce energy by fusion, but still glow and give off heat from its previous fusion; the enormous effect of the Sun on Earth has been recognized since prehistoric times, the Sun has been regarded by some cultures as a deity.
The synodic rotation of Earth and its orbit around the Sun are the basis of solar calendars, one of, the predominant calendar in use today. The English proper name Sun may be related to south. Cognates to English sun appear in other Germanic languages, including Old Frisian sunne, Old Saxon sunna, Middle Dutch sonne, modern Dutch zon, Old High German sunna, modern German Sonne, Old Norse sunna, Gothic sunnō. All Germanic terms for the Sun stem from Proto-Germanic *sunnōn; the Latin name for the Sun, Sol, is not used in everyday English. Sol is used by planetary astronomers to refer to the duration of a solar day on another planet, such as Mars; the related word solar is the usual adjectival term used for the Sun, in terms such as solar day, solar eclipse, Solar System. A mean Earth solar day is 24 hours, whereas a mean Martian'sol' is 24 hours, 39 minutes, 35.244 seconds. The English weekday name Sunday stems from Old English and is a result of a Germanic interpretation of Latin dies solis, itself a translation of the Greek ἡμέρα ἡλίου.
The Sun is a G-type main-sequence star. The Sun has an absolute magnitude of +4.83, estimated to be brighter than about 85% of the stars in the Milky Way, most of which are red dwarfs. The Sun is heavy-element-rich, star; the formation of the Sun may have been triggered by shockwaves from more nearby supernovae. This is suggested by a high abundance of heavy elements in the Solar System, such as gold and uranium, relative to the abundances of these elements in so-called Population II, heavy-element-poor, stars; the heavy elements could most plausibly have been produced by endothermic nuclear reactions during a supernova, or by transmutation through neutron absorption within a massive second-generation star. The Sun is by far the brightest object in the Earth's sky, with an apparent magnitude of −26.74. This is about 13 billion times brighter than the next brightest star, which has an apparent magnitude of −1.46. The mean distance of the Sun's center to Earth's center is 1 astronomical unit, though the distance varies as Earth moves from perihelion in January to aphelion in July.
At this average distance, light travels from the Sun's horizon to Earth's horizon in about 8 minutes and 19 seconds, while light from the closest points of the Sun and Earth takes about two seconds less. The energy of this sunlight supports all life on Earth by photosynthesis, drives Earth's climate and weather; the Sun does not have a definite boundary, but its density decreases exponentially with increasing height above the photosphere. For the purpose of measurement, the Sun's radius is considered to be the distance from its center to the edge of the photosphere, the apparent visible surface of the Sun. By this measure, the Sun is a near-perfect sphere with an oblateness estimated at about 9 millionths, which means that its polar diameter differs from its equatorial diameter by only 10 kilometres; the tidal effect of the planets is weak and does not affect the shape of the Sun. The Sun rotates faster at its equator than at its poles; this differential rotation is caused by convective motion
Biodiversity refers to the variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic and ecosystem level. Terrestrial biodiversity is greater near the equator, the result of the warm climate and high primary productivity. Biodiversity is not distributed evenly on Earth, is richest in the tropics; these tropical forest ecosystems cover less than 10 percent of earth's surface, contain about 90 percent of the world's species. Marine biodiversity is highest along coasts in the Western Pacific, where sea surface temperature is highest, in the mid-latitudinal band in all oceans. There are latitudinal gradients in species diversity. Biodiversity tends to cluster in hotspots, has been increasing through time, but will be to slow in the future. Rapid environmental changes cause mass extinctions. More than 99.9 percent of all species that lived on Earth, amounting to over five billion species, are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.
More in May 2016, scientists reported that 1 trillion species are estimated to be on Earth with only one-thousandth of one percent described. The total amount of related DNA base pairs on Earth is estimated at 5.0 x 1037 and weighs 50 billion tonnes. In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC. In July 2016, scientists reported identifying a set of 355 genes from the Last Universal Common Ancestor of all organisms living on Earth; the age of the Earth is about 4.54 billion years. The earliest undisputed evidence of life on Earth dates at least from 3.5 billion years ago, during the Eoarchean Era after a geological crust started to solidify following the earlier molten Hadean Eon. There are microbial mat fossils found in 3.48 billion-year-old sandstone discovered in Western Australia. Other early physical evidence of a biogenic substance is graphite in 3.7 billion-year-old meta-sedimentary rocks discovered in Western Greenland. More in 2015, "remains of biotic life" were found in 4.1 billion-year-old rocks in Western Australia.
According to one of the researchers, "If life arose quickly on Earth.. it could be common in the universe."Since life began on Earth, five major mass extinctions and several minor events have led to large and sudden drops in biodiversity. The Phanerozoic eon marked a rapid growth in biodiversity via the Cambrian explosion—a period during which the majority of multicellular phyla first appeared; the next 400 million years included repeated, massive biodiversity losses classified as mass extinction events. In the Carboniferous, rainforest collapse led to a great loss of animal life; the Permian–Triassic extinction event, 251 million years ago, was the worst. The most recent, the Cretaceous–Paleogene extinction event, occurred 65 million years ago and has attracted more attention than others because it resulted in the extinction of the dinosaurs; the period since the emergence of humans has displayed an ongoing biodiversity reduction and an accompanying loss of genetic diversity. Named the Holocene extinction, the reduction is caused by human impacts habitat destruction.
Conversely, biodiversity positively impacts human health in a number of ways, although a few negative effects are studied. The United Nations designated 2011–2020 as the United Nations Decade on Biodiversity. 1916 - The term biological diversity was used first by J. Arthur Harris in "The Variable Desert," Scientific American, JSTOR 6182: "The bare statement that the region contains a flora rich in genera and species and of diverse geographic origin or affinity is inadequate as a description of its real biological diversity." 1975 - The term natural diversity was introduced 1980 - Thomas Lovejoy introduced the term biological diversity to the scientific community in a book.. It became used. 1985 -The contracted form biodiversity was coined by W. G. Rosen 1985 - The term "biodiversity" appears in the article, "A New Plan to Conserve the Earth's Biota" by Laura Tangley. 1988 - The term biodiversity first appeared in a publication. The present - the term has achieved widespread use. "Biodiversity" is most used to replace the more defined and long established terms, species diversity and species richness.
Biologists most define biodiversity as the "totality of genes and ecosystems of a region". An advantage of this definition is that it seems to describe most circumstances and presents a unified view of the traditional types of biological variety identified: taxonomic diversity ecological diversity morphological diversity functional diversity This multilevel construct is consistent with Datman and Lovejoy. An explicit definition consistent with this interpretation was first given in a paper by Bruce A. Wilcox commissioned by the International Union for the Conservation of Nature and Natural Resources for the 1982 World National Parks Conference. Wilcox's definition was "Biological diversity is the variety of life forms...at all levels of biologi
Earth science or geoscience includes all fields of natural science related to the planet Earth. This is a branch of science dealing with the physical constitution of its atmosphere. Earth science is the study of our planet’s physical characteristics, from earthquakes to raindrops, floods to fossils. Earth science can be with a much older history. Earth science encompasses four main branches of study, the lithosphere, the hydrosphere, the atmosphere, the biosphere, each of, further broken down into more specialized fields. There are both holistic approaches to earth sciences, it is the study of Earth and its neighbors in space. Some earth scientists use their knowledge of the planet to locate and develop energy and mineral resources. Others study the impact of human activity on Earth's environment, design methods to protect the planet; some use their knowledge about earth processes such as volcanoes and hurricanes to plan communities that will not expose people to these dangerous events. The earth sciences can include the study of geology, the lithosphere, the large-scale structure of the earth's interior, as well as the atmosphere and biosphere.
Earth scientists use tools from geography, physics, chemistry and mathematics to build a quantitative understanding of how the earth works and evolves. Earth science affects our everyday lives. For example, meteorologists study the watch for dangerous storms. Hydrologists warn of floods. Seismologists try to predict where they will strike. Geologists study rocks and help to locate useful minerals. Earth scientists work in the field—perhaps climbing mountains, exploring the seabed, crawling through caves, or wading in swamps, they measure and collect samples they record their findings on charts and maps. The following fields of science are categorized within the earth sciences: Physical geography covers aspects of geomorphology, soil study, meteorology and biogeography. Geology describes the rocky parts of its historic development. Major subdisciplines are mineralogy and petrology, geomorphology, stratigraphy, structural geology, engineering geology, sedimentology. Geophysics and geodesy investigate the shape of the Earth, its reaction to forces and its magnetic and gravity fields.
Geophysicists explore the earth's core and mantle as well as the tectonic and seismic activity of the lithosphere. Geophysics is used to supplement the work of geologists in developing a comprehensive understanding of crustal geology in mineral and petroleum exploration. Seismologists use geophysics to understand plate tectonic shifting, as well as predict seismic activity. Soil science covers the outermost layer of the earth's crust, subject to soil formation processes. Major subdivisions in this field of study include pedology. Ecology covers the interactions between the flora; this field of study differentiates the study of Earth from the study of other planets in the Solar System, Earth being the only planet teeming with life. Hydrology and limnology are studies which focus on the movement and quality of the water and involves all the components of the hydrologic cycle on the Earth and its atmosphere. "Sub-disciplines of hydrology include hydrometeorology, surface water hydrology, watershed science, forest hydrology, water chemistry."
Glaciology covers the icy parts of the Earth. Atmospheric sciences cover the gaseous parts of the Earth between the exosphere. Major subdisciplines include meteorology, atmospheric chemistry, atmospheric physics. Plate tectonics, mountain ranges and earthquakes are geological phenomena that can be explained in terms of physical and chemical processes in the earth's crust. Beneath the Earth's crust lies the mantle, heated by the radioactive decay of heavy elements; the mantle is not quite solid and consists of magma, in a state of semi-perpetual convection. This convection process causes the lithospheric plates to move, albeit slowly; the resulting process is known as plate tectonics. Plate tectonics might be thought of as the process; as the result of seafloor spreading, new crust and lithosphere is created by the flow of magma from the mantle to the near surface, through fissures, where it cools and solidifies. Through subduction, oceanic crust and lithosphere returns to the convecting mantle. Areas of the crust where new crust is created are called divergent boundaries, those where it is brought back into the earth are convergent boundaries and those where plates slide past each other, but no new lithospheric material is created or destroyed, are referred to as transform boundaries Earthquakes result from the movement of the lithospheric plates, they occur near convergent boundaries where parts of the crust are forced into the earth as part of subduction.
Volcanoes result from the melting of subducted crust material. Crust material, forced into the asthenosphere melts, some portion of the melted material becomes light enough to rise to the surface—giving birth to volcanoes; the troposphere, mesosphere and exosphere are the five layers which make up Earth's atmosphere. 75 % of the gases in the atmosphere are located within the lowest layer. In all, the atmosphere is made up of about 78.0% nitrogen, 20.9% ox
YouTube is an American video-sharing website headquartered in San Bruno, California. Three former PayPal employees—Chad Hurley, Steve Chen, Jawed Karim—created the service in February 2005. Google bought the site in November 2006 for US$1.65 billion. YouTube allows users to upload, rate, add to playlists, comment on videos, subscribe to other users, it offers a wide variety of corporate media videos. Available content includes video clips, TV show clips, music videos and documentary films, audio recordings, movie trailers, live streams, other content such as video blogging, short original videos, educational videos. Most of the content on YouTube is uploaded by individuals, but media corporations including CBS, the BBC, Hulu offer some of their material via YouTube as part of the YouTube partnership program. Unregistered users can only watch videos on the site, while registered users are permitted to upload an unlimited number of videos and add comments to videos. Videos deemed inappropriate are available only to registered users affirming themselves to be at least 18 years old.
YouTube and its creators earn advertising revenue from Google AdSense, a program which targets ads according to site content and audience. The vast majority of its videos are free to view, but there are exceptions, including subscription-based premium channels, film rentals, as well as YouTube Music and YouTube Premium, subscription services offering premium and ad-free music streaming, ad-free access to all content, including exclusive content commissioned from notable personalities; as of February 2017, there were more than 400 hours of content uploaded to YouTube each minute, one billion hours of content being watched on YouTube every day. As of August 2018, the website is ranked as the second-most popular site in the world, according to Alexa Internet. YouTube has faced criticism over aspects of its operations, including its handling of copyrighted content contained within uploaded videos, its recommendation algorithms perpetuating videos that promote conspiracy theories and falsehoods, hosting videos ostensibly targeting children but containing violent and/or sexually suggestive content involving popular characters, videos of minors attracting pedophilic activities in their comment sections, fluctuating policies on the types of content, eligible to be monetized with advertising.
YouTube was founded by Chad Hurley, Steve Chen, Jawed Karim, who were all early employees of PayPal. Hurley had studied design at Indiana University of Pennsylvania, Chen and Karim studied computer science together at the University of Illinois at Urbana–Champaign. According to a story, repeated in the media and Chen developed the idea for YouTube during the early months of 2005, after they had experienced difficulty sharing videos, shot at a dinner party at Chen's apartment in San Francisco. Karim did not attend the party and denied that it had occurred, but Chen commented that the idea that YouTube was founded after a dinner party "was very strengthened by marketing ideas around creating a story, digestible". Karim said the inspiration for YouTube first came from Janet Jackson's role in the 2004 Super Bowl incident, when her breast was exposed during her performance, from the 2004 Indian Ocean tsunami. Karim could not find video clips of either event online, which led to the idea of a video sharing site.
Hurley and Chen said that the original idea for YouTube was a video version of an online dating service, had been influenced by the website Hot or Not. Difficulty in finding enough dating videos led to a change of plans, with the site's founders deciding to accept uploads of any type of video. YouTube began as a venture capital-funded technology startup from an $11.5 million investment by Sequoia Capital and an $8 million investment from Artis Capital Management between November 2005 and April 2006. YouTube's early headquarters were situated above a pizzeria and Japanese restaurant in San Mateo, California; the domain name www.youtube.com was activated on February 14, 2005, the website was developed over the subsequent months. The first YouTube video, titled Me at the zoo, shows co-founder Jawed Karim at the San Diego Zoo; the video was uploaded on April 23, 2005, can still be viewed on the site. YouTube offered the public a beta test of the site in May 2005; the first video to reach one million views was a Nike advertisement featuring Ronaldinho in November 2005.
Following a $3.5 million investment from Sequoia Capital in November, the site launched on December 15, 2005, by which time the site was receiving 8 million views a day. The site grew and, in July 2006, the company announced that more than 65,000 new videos were being uploaded every day, that the site was receiving 100 million video views per day. According to data published by market research company comScore, YouTube is the dominant provider of online video in the United States, with a market share of around 43% and more than 14 billion views of videos in May 2010. In May 2011, 48 hours of new videos were uploaded to the site every minute, which increased to 60 hours every minute in January 2012, 100 hours every minute in May 2013, 300 hours every minute in November 2014, 400 hours every minute in February 2017; as of January 2012, the site had 800 million unique users a month. It is estimated that in 2007 YouTube consumed as much bandwidth as the entire Internet in 2000. According to third-party web analytics providers and SimilarWeb, YouTube is the second-most visited website in the world, as of December 2016.
New York City
The City of New York called either New York City or New York, is the most populous city in the United States. With an estimated 2017 population of 8,622,698 distributed over a land area of about 302.6 square miles, New York is the most densely populated major city in the United States. Located at the southern tip of the state of New York, the city is the center of the New York metropolitan area, the largest metropolitan area in the world by urban landmass and one of the world's most populous megacities, with an estimated 20,320,876 people in its 2017 Metropolitan Statistical Area and 23,876,155 residents in its Combined Statistical Area. A global power city, New York City has been described as the cultural and media capital of the world, exerts a significant impact upon commerce, research, education, tourism, art and sports; the city's fast pace has inspired the term New York minute. Home to the headquarters of the United Nations, New York is an important center for international diplomacy.
Situated on one of the world's largest natural harbors, New York City consists of five boroughs, each of, a separate county of the State of New York. The five boroughs – Brooklyn, Manhattan, The Bronx, Staten Island – were consolidated into a single city in 1898; the city and its metropolitan area constitute the premier gateway for legal immigration to the United States. As many as 800 languages are spoken in New York, making it the most linguistically diverse city in the world. New York City is home to more than 3.2 million residents born outside the United States, the largest foreign-born population of any city in the world. In 2017, the New York metropolitan area produced a gross metropolitan product of US$1.73 trillion. If greater New York City were a sovereign state, it would have the 12th highest GDP in the world. New York is home to the highest number of billionaires of any city in the world. New York City traces its origins to a trading post founded by colonists from the Dutch Republic in 1624 on Lower Manhattan.
The city and its surroundings came under English control in 1664 and were renamed New York after King Charles II of England granted the lands to his brother, the Duke of York. New York served as the capital of the United States from 1785 until 1790, it has been the country's largest city since 1790. The Statue of Liberty greeted millions of immigrants as they came to the U. S. by ship in the late 19th and early 20th centuries and is an international symbol of the U. S. and its ideals of liberty and peace. In the 21st century, New York has emerged as a global node of creativity and entrepreneurship, social tolerance, environmental sustainability, as a symbol of freedom and cultural diversity. Many districts and landmarks in New York City are well known, with the city having three of the world's ten most visited tourist attractions in 2013 and receiving a record 62.8 million tourists in 2017. Several sources have ranked New York the most photographed city in the world. Times Square, iconic as the world's "heart" and its "Crossroads", is the brightly illuminated hub of the Broadway Theater District, one of the world's busiest pedestrian intersections, a major center of the world's entertainment industry.
The names of many of the city's landmarks and parks are known around the world. Manhattan's real estate market is among the most expensive in the world. New York is home to the largest ethnic Chinese population outside of Asia, with multiple signature Chinatowns developing across the city. Providing continuous 24/7 service, the New York City Subway is the largest single-operator rapid transit system worldwide, with 472 rail stations. Over 120 colleges and universities are located in New York City, including Columbia University, New York University, Rockefeller University, which have been ranked among the top universities in the world. Anchored by Wall Street in the Financial District of Lower Manhattan, New York has been called both the most economically powerful city and the leading financial center of the world, the city is home to the world's two largest stock exchanges by total market capitalization, the New York Stock Exchange and NASDAQ. In 1664, the city was named in honor of the Duke of York.
James's older brother, King Charles II, had appointed the Duke proprietor of the former territory of New Netherland, including the city of New Amsterdam, which England had seized from the Dutch. During the Wisconsinan glaciation, 75,000 to 11,000 years ago, the New York City region was situated at the edge of a large ice sheet over 1,000 feet in depth; the erosive forward movement of the ice contributed to the separation of what is now Long Island and Staten Island. That action left bedrock at a shallow depth, providing a solid foundation for most of Manhattan's skyscrapers. In the precolonial era, the area of present-day New York City was inhabited by Algonquian Native Americans, including the Lenape, whose homeland, known as Lenapehoking, included Staten Island; the first documented visit into New York Harbor by a European was in 1524 by Giovanni da Verrazzano, a Florentine explorer in the service of the French crown. He named it Nouvelle Angoulême. A Spanish expedition led by captain Estêvão Gomes, a Portuguese sailing for Emperor Charles V, arrived in New York Harbor in January 1525 and charted the mouth of the Hudson River, which he named Río de San Antonio.
The Padrón Rea