California Institute of Technology

The California Institute of Technology (branded as Caltech) is a private research university in Pasadena, California, United States. The university is responsible for many modern scientific advancements and is among a small group of institutes of technology in the United States that are devoted to the instruction of pure and applied sciences.

The institution was founded as a preparatory and vocational school by Amos G. Throop in 1891 and began attracting influential scientists such as George Ellery Hale, Arthur Amos Noyes, and Robert Andrews Millikan in the early 20th century. The vocational and preparatory schools were disbanded and spun off in 1910, and the college assumed its present name in 1920. In 1934, Caltech was elected to the Association of American Universities, and the antecedents of NASA's Jet Propulsion Laboratory, which Caltech continues to manage and operate, were established between 1936 and 1943 under Theodore von Kármán.

Caltech has six academic divisions with strong emphasis on science and engineering, managing $332 million in research grants as of 2010. Its 124-acre (50 ha) primary campus is located approximately 11 mi (18 km) northeast of downtown Los Angeles, in Pasadena. First-year students are required to live on campus, and 95% of undergraduates remain in the on-campus housing system at Caltech. Students agree to abide by an honor code which allows faculty to assign take-home examinations. The Caltech Beavers compete in 13 intercollegiate sports in the NCAA Division III's Southern California Intercollegiate Athletic Conference (SCIAC).

Scientists and engineers at or from the university have played an essential role in many modern scientific breakthroughs and innovations, including advances in space research, sustainability science, quantum physics, and seismology. As of October 2024, there are 80 Nobel laureates who have been affiliated with Caltech, making it the institution with the highest number of Nobelists per capita in America. This includes 48 alumni and faculty members (49 prizes, with chemist Linus Pauling being the only individual in history to win two unshared prizes). In addition, 68 National Medal of Science Recipients, 43 MacArthur Fellows, 15 National Medal of Technology and Innovation recipients, 11 astronauts, 5 science advisors to the president, 4 Fields Medalists, and 6 Turing Award winners have been affiliated with Caltech.

History

Throop College

Caltech started as a vocational school founded in present-day Old Pasadena on Fair Oaks Avenue and Chestnut Street on September 23, 1891, by local businessman and politician Amos G. Throop. The school was known successively as Throop University, Throop Polytechnic Institute (and Manual Training School) and Throop College of Technology before acquiring its current name in 1920. The vocational school was disbanded and the preparatory program was split off to form the independent Polytechnic School in 1907.

At a time when scientific research in the United States was still in its infancy, George Ellery Hale, a solar astronomer from the University of Chicago, founded the Mount Wilson Observatory in 1904. He joined Throop's board of trustees in 1907, and soon began developing the university, and the whole of Pasadena, into a major scientific and cultural destination. He engineered the appointment of James A. B. Scherer, a literary scholar untutored in science but very capable in administration and fund-raising, to Throop's presidency in 1908. Scherer persuaded retired businessman and trustee Charles W. Gates to donate $25,000 in seed money (equivalent to $900,000 in 2025) to build Gates Laboratory, the first science building on campus.

World Wars

In 1910, Throop moved to its current site. Arthur Fleming donated the land for the permanent campus site. Theodore Roosevelt delivered an address at Throop Institute on March 21, 1911, and he declared:

I want to see institutions like Throop turn out perhaps ninety-nine of every hundred students as men who are to do given pieces of industrial work better than any one else can do them; I want to see those men do the kind of work that is now being done on the Panama Canal and on the great irrigation projects in the interior of this country—and the one-hundredth man I want to see with the kind of cultural scientific training that will make him and his fellows the matrix out of which you can occasionally develop a man like your great astronomer, George Ellery Hale.

Also in 1911, a bill was introduced in the California Legislature calling for the establishment of a publicly funded "California Institute of Technology", with an initial budget of a million dollars, ten times the budget of Throop at the time. The board of trustees offered to turn Throop over to the state, but the presidents of Stanford University and the University of California, Berkeley successfully lobbied to defeat the bill, which allowed Throop to develop as the only scientific research-oriented educational institute in southern California, public or private, until the onset of World War II necessitated the broader development of research-based science education. The promise of Throop attracted physical chemist Arthur Amos Noyes from MIT to develop the institution and assist in establishing it as a center for science and technology.

Campus

Caltech's 124-acre (50 ha) primary campus is located in Pasadena, California, approximately 11 miles (18 km) northeast of downtown Los Angeles. It is within walking distance of Old Town Pasadena and the Pasadena Playhouse District and therefore the two locations are frequent getaways for Caltech students.

In 1917 Hale hired architect Bertram Goodhue to produce a master plan for the 22 acres (8.9 ha) campus. Goodhue conceived the overall layout of the campus and designed the physics building, Dabney Hall, and several other structures, in which he sought to be consistent with the local climate, the character of the school, and Hale's educational philosophy. Goodhue's designs for Caltech were also influenced by the traditional Spanish mission architecture of Southern California.

During the 1960s, Caltech underwent considerable expansion, in part due to the philanthropy of alumnus and professor Arnold O. Beckman. In 1953, Beckman was asked to join the Caltech Board of Trustees. In 1964, he became its chairman. Over the next few years, as Caltech's president emeritus David Baltimore described it, Arnold Beckman and his wife Mabel "shaped the destiny of Caltech".

In 1971 a magnitude-6.6 earthquake in San Fernando caused some damage to the Caltech campus. Engineers who evaluated the damage found that two historic buildings dating from the early days of the Institute—Throop Hall and the Goodhue-designed Culbertson Auditorium—had cracked.

New additions to the campus include the Cahill Center for Astronomy and Astrophysics and the Walter and Leonore Annenberg Center for Information Science and Technology, which opened in 2009, and the Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering followed in March 2010. The institute also concluded an upgrading of the South Houses in 2006. In late 2010, Caltech completed a 1.3 MW solar array projected to produce approximately 1.6 GWh in 2011.

Organization and administration

Caltech is incorporated as a non-profit corporation and is governed by a privately appointed 46-member board of trustees who serve five-year terms of office and retire at the age of 72. The trustees elect a president to serve as the chief executive officer of the institute and administer the affairs on the institute on behalf of the board, a provost who serves as the chief academic officer of the institute below the president, and ten other vice presidential and other senior positions. Thomas F. Rosenbaum became the ninth president of Caltech in 2014. Caltech's endowment is governed by a permanent trustee committee and administered by an investment office.

The institute is organized into six primary academic divisions: Biology and Biological Engineering (founded 1927), Chemistry and Chemical Engineering (founded 1926), Engineering and Applied Science (founded 1926), Geological and Planetary Sciences (founded 1927), Humanities and Social Sciences (founded 1926), Physics, Mathematics, and Astronomy (founded 1926). Given Caltech's historical prestige and the small size of its faculty in many major fields, the institution is exceptionally careful in selecting candidates. This rigorous process can result in some positions remaining unfilled for several years until the right candidate is found. Caltech dedicates significant resources to attract top-tier faculty and provides them with substantial financial support to foster their research and academic endeavors. The voting faculty of Caltech include all professors, instructors, research associates and fellows, and the University Librarian. Faculty are responsible for establishing admission requirements, academic standards, and curricula. The Faculty Board is the faculty's representative body and consists of 18 elected faculty representatives as well as other senior administration officials. Full-time professors are expected to teach classes, conduct research, advise students, and perform administrative work such as serving on committees.

Founded in 1930s, the Jet Propulsion Laboratory (JPL) is a federally funded research and development center (FFRDC) owned by NASA and operated as a division of Caltech through a contract between NASA and Caltech. In 2008, JPL spent over $1.6 billion on research and development and employed over 5,000 project-related and support employees. The JPL Director also serves as a Caltech Vice President and is responsible to the President of the Institute for the management of the laboratory.

Academics

Caltech is a small four-year, highly residential research university with slightly more students in graduate programs than undergraduate. The institute has been accredited by the Western Association of Schools and Colleges since 1949. Caltech is on the quarter system: the fall term starts in late September and ends before Christmas, the second term starts after New Year's Day and ends in mid-March, and the third term starts in late March or early April and ends in early June.

Undergraduate admissions

Admission to Caltech is extremely rigorous. Prior to going test blind, Caltech students had the highest test scores in the nation. In admissions for the Class of 2028 (entering 2024), Caltech was ranked the hardest college in America to gain acceptance to by admit rate, at an all-time low of 2.7%. For the freshmen who enrolled in 2019 (Class of 2023) the middle 50% range of SAT were 740–780 for evidence-based reading and writing and 790–800 for math, and 1530–1570 total. The middle 50% range ACT Composite score was 35–36. The SAT Math Level 2 middle 50% range was 800–800. The middle 50% range for the SAT Physics Subject Test was 760–800; SAT Chemistry Subject Test was 760–800; SAT Biology Subject Tests was 760–800. In June 2020, Caltech announced a test-blind policy where they would not require nor consider test scores for the next two years. The moratorium was extended twice, starting July 2021, but was subsequently cancelled starting with the Class of 2029. The institute is need-blind for domestic applicants.

For the Class of 2027 (enrolled Fall 2023), Caltech received 13,136 applications and accepted 412 applicants for a 3.14% admit rate; 270 enrolled. The subsequent year, for the Class of 2028, Caltech reduced the number of seats by almost one hundred, accepting 315 applicants out of approximately 13,000 total applications. For the Class of 2025, 32% were of underrepresented ancestry (which includes students who self-identify as American Indian/Alaska Native, Hispanic/Latino, Black/African American, and/or Native Hawaiian/Pacific Islander), and 6% were foreign students.

Tuition and financial aid

Undergraduate tuition for the 2021–2022 school year was $56,394 and total annual costs were estimated to be $79,947 excluding the Caltech Student Health Insurance Plan. In 2012–2013, Caltech awarded $17.1 million in need-based aid, $438k in non-need-based aid, and $2.51 million in self-help support to enrolled undergraduate students. The average financial aid package of all students eligible for aid was $38,756 and students graduated with an average debt of $15,090.

Research

Caltech is classified among "R1: Doctoral Universities – Very High Research Activity". Caltech was elected to the Association of American Universities in 1934 and remains a research university with "very high" research activity, primarily in STEM fields. Caltech manages research expenditures of $270 million annually, 66th among all universities in the U.S. and 17th among private institutions without medical schools for 2008. The largest federal agencies contributing to research are NASA, National Science Foundation, Department of Health and Human Services, Department of Defense, and Department of Energy. Caltech received $144 million in federal funding for the physical sciences, $40.8 million for the life sciences, $33.5 million for engineering, $14.4 million for environmental sciences, $7.16 million for computer sciences, and $1.97 million for mathematical sciences in 2008.

The institute was awarded an all-time high funding of $357 million in 2009. Active funding from the National Science Foundation Directorate of Mathematical and Physical Science (MPS) for Caltech stands at $343 million as of 2011, the highest for any educational institution in the nation, and higher than the total funds allocated to any state except California and New York.

In 2005, Caltech had 739,000 square feet (68,700 m2) dedicated to research: 330,000 square feet (30,700 m2) to physical sciences, 163,000 square feet (15,100 m2) to engineering, and 160,000 square feet (14,900 m2) to biological sciences.

In addition to managing JPL, Caltech also operates the Palomar Observatory in San Diego County, the Owens Valley Radio Observatory in Bishop, California, the Submillimeter Observatory and W. M. Keck Observatory at the Mauna Kea Observatory, the Laser Interferometer Gravitational-Wave Observatory at Livingston, Louisiana and Richland, Washington, and Kerckhoff Marine Laboratory in Corona del Mar, California. The Institute launched the Kavli Nanoscience Institute at Caltech in 2006, the Keck Institute for Space Studies in 2008, and is also the current home for the Einstein Papers Project. The Spitzer Science Center (SSC), part of the Infrared Processing and Analysis Center located on the Caltech campus, is the data analysis and community support center for NASA's Spitzer Space Telescope.

Caltech partnered with UCLA to establish a Joint Center for Translational Medicine (UCLA-Caltech JCTM), which conducts experimental research into clinical applications, including the diagnosis and treatment of diseases such as cancer. In 1997, Caltech partnered with UCLA to train physician-scientists.

Students

Caltech enrolled 987 undergraduate students and 1,443 graduate students for the 2024–2025 school year. Women made up 45% of the undergraduate and 36% of the graduate student body. The racial demographics of the school substantially differ from those of the nation as a whole.

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