The 20th century America was one of the major hubs of scientific and technological developments in the world. In the early part of the century, many prominent European scientists including Hans Bethe, Albert Einstein, Enrico Fermi, Leó Szilárd, Edward Teller, and Felix Bloch migrated to the United States where they accomplished several important achievements. During this era, scientists in the US made one highly controversial yet commendable accomplishment—the harnessing of nuclear energy. Gerald Woodrow Johnson, William Howard Arnold, and Charles Kincaid Bockelman were some of the established nuclear scientists of 20th century. America was also a pioneer in computer technology and information technology. Pioneers like John McCarthy who was one of the founders of the discipline of artificial intelligence played a major role in accelerating America’s progress in the area of computer science. Grace Brewster Murray Hopper, born in the early 20th century, was one of the first programmers of the Harvard Mark I computer. Americans have led the world in physics as well with the likes of Alan Harvey Guth, Steven Weinberg, and Sam Bard Treiman making important contributions to the field. Read on to learn more about the life and works of famous American scientists of the 20th century.
Bill GatesBill Gates
28 October 1955
Co-Founder of Microssoft
Albert EinsteinAlbert Einstein
14 March 1879

Nikola TeslaNikola Tesla
10 July 1856

Larry PageLarry Page
26 March 1973
Co-founder of Google

Wernher Von BraunWernher Von Braun
23 March 1912

Steve WozniakSteve Wozniak
11 August 1950
Co-founder of Apple Computer (Apple Inc.)
Richard FeynmanRichard Feynman
11 May 1918

John Forbes Nash Jr.John Forbes Nash Jr.
13 June 1928

Neil deGrasse TysonNeil deGrasse Tyson
05 October 1958
Carl SaganCarl Sagan
09 November 1934
Astronomer, Astrophysicist, Writer

Katherine JohnsonKatherine Johnson
26 August 1918
Sergey BrinSergey Brin
21 August 1973
Computer scientist

Isaac AsimovIsaac Asimov
02 January 1920
Novelist, Professor

Sally RideSally Ride
26 May 1951
Physicist, Astronaut

J. Robert OppenheimerJ. Robert Oppenheimer
22 April 1904

John von NeumannJohn von Neumann
28 December 1903
Mathematician, Computer Scientist
Kary B. MullisKary B. Mullis
28 December 1944

Jonas SalkJonas Salk
28 October 1914
Medical researcher

Gabe NewellGabe Newell
03 November 1962

Kurt GödelKurt Gödel
28 April 1906
Mathematician, Philosopher
Richard StallmanRichard Stallman
16 March 1953
Software Programmer

James Harris SimonsJames Harris Simons
1938 AD
Mathematicians & Hedge Fund Manager
Grace HopperGrace Hopper
09 December 1906
Computer Scientist

Tom LehrerTom Lehrer
09 April 1928
American musician

Enrico FermiEnrico Fermi
29 September 1901
Nobel Laureate in Physics
Norman BorlaugNorman Borlaug
25 March 1914
Father of the Green Revolution

James WatsonJames Watson
06 April 1928
Molecular Biologist
Zbigniew BrzezinskiZbigniew Brzezinski
28 March 1928
Former Diplomat, Political Scientist

Dennis RitchieDennis Ritchie
09 September 1941
Computer Scientist

Rachel CarsonRachel Carson
27 May 1907
Marine biologist
Linus PaulingLinus Pauling
28 February 1901
Chemist, Biochemist

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Claude ShannonClaude Shannon
30 April 1916
Mathematician, Cryptographer
Robert BallardRobert Ballard
30 June 1942
Deep Sea Explorer

Donald KnuthDonald Knuth
10 January 1938
Computer Scientist

Josef Allen HynekJ. Allen Hynek
01 May 1910
Astronomer, Ufologist

Edward TellerEdward Teller
15 January 1908
Stephen Jay GouldStephen Jay Gould
10 September 1941
Ken ThompsonKen Thompson
04 February 1943
Computer Scientist

Kip ThorneKip Thorne
01 June 1940

Jared DiamondJared Diamond
10 September 1937
Scientist & Author

Vint CerfVint Cerf
23 June 1943
Vannevar BushVannevar Bush
11 March 1890

E. O. WilsonE. O. Wilson
10 June 1929

William ShockleyWilliam Shockley
13 February 1910

Tommy RettigTommy Rettig
10 December 1941
Child Actor

Robert H. GoddardRobert H. Goddard
05 October 1882
Thomas KuhnThomas Kuhn
18 July 1922
Physicist, Philosopher

Charles Sanders PeirceCharles Sanders Peirce
10 September 1839
Scientist, Philosopher
Lewis Howard LatimerLewis Howard Latimer
04 September 1848

Arthur D. LevinsonArthur D. Levinson
31 March 1950

John Archibald WheelerJohn Archibald Wheeler
09 July 1911
Peggy WhitsonPeggy Whitson
09 February 1960
Astronaut, Biochemist

David BohmDavid Bohm
20 December 1917
Har Gobind KhoranaHar Gobind Khorana
09 January 1922

Norbert WienerNorbert Wiener
26 November 1894
Father of Cybernetics

John BardeenJohn Bardeen
23 May 1908
Nobel Laureate in Physics

Lynn MargulisLynn Margulis
05 March 1938

David BaltimoreDavid Baltimore
07 March 1938
Steven WeinbergSteven Weinberg
03 May 1933

Murray Gell-MannMurray Gell-Mann
15 September 1929

Manjul BhargavaManjul Bhargava
08 August 1974

Steven ChuSteven Chu
28 February 1948
Former United States Secretary of Energy
Alan KayAlan Kay
17 May 1940
Computer Scientist

Barbara McClintockBarbara McClintock
16 June 1902
Venkatraman RamakrishnanVenkatraman Ramakrishnan
1952 AD
Structural biologist

Glen T. SeaborgGlenn T. Seaborg
19 April 1912

Hans BetheHans Bethe
02 July 1906
Eugene Paul Eugene Wigner
17 November 1902
Physicist & Mathematician

Luis Walter AlvarezLuis Walter Alvarez
13 June 1911
Judea PearlJudea Pearl
04 September 1936
Computer Scientist

Chen Ning YangChen Ning Yang
01 October 1922

Julian SchwingerJulian Schwinger
12 February 1918
Henrietta Swan LeavittHenrietta Swan Leavitt
04 July 1868

Stephanie KwolekStephanie Kwolek
31 July 1923
Elizabeth BlackburnElizabeth Blackburn
26 November 1948
American-Australian researcher

Franklin DiazFranklin Chang Díaz
05 April 1950
Former NASA Astronaut

Ernest LawrenceErnest Lawrence
08 August 1901

Arno Allan PenziasArno Allan Penzias
26 April 1933
Charles K. KaoCharles K. Kao
04 November 1933
Electrical Engineer
Ernst MayrErnst Mayr
05 July 1904

Tsung-Dao LeeTsung-Dao Lee
24 November 1926

Gertrude B. ElionGertrude B. Elion
23 January 1918
Biochemist, Pharmacologist

Maria Goeppert MayerMaria Goeppert-Mayer
28 June 1906
Ernest Everett JustErnest Everett Just
14 August 1883

Robert HofstadterRobert Hofstadter
05 February 1915

Erwin ChargaffErwin Chargaff
11 August 1905

Radia PerlmanRadia Perlman
18 December 1951
Computer Network Engineer

Elias James CoreyElias James Corey
12 July 1928
Organic Chemist
Sheldon Lee GlashowSheldon Lee Glashow
05 December 1932

Robert Burn WoodworthRobert Burns Woodward
10 April 1917
Organic Chemist
Ferid MuradFerid Murad
14 September 1936
Physician and Pharmacologist

Roald HoffmannRoald Hoffmann
18 July 1937
Theoretical Chemist
Leon M. LedermanLeon M. Lederman
15 July 1922
Charles Hard TownesCharles H. Townes
28 July 1915