Famous Scientists

  • Home
  • Top 100 Scientists
  • List of Scientists
  • Blog

Elizebeth Smith Friedman

Elizebeth Smith Friedman

Lived 1892 – 1980.

In the 1930s, Elizebeth Smith Friedman became America’s and indeed the world’s best-known codebreaker. She inflicted severe damage on the interests of organized crime and at times needed to be protected by bodyguards. The evidence she gave in criminal trials describing how she cracked encrypted messages passing between mobsters made her a newspaper sensation.

Later, during World War 2, she broke coded messages sent on Germany’s Enigma machines. These messages revealed a plot by the Argentinian government to help Germany replace South American governments with Nazis, giving Germany bases from which to attack America. Her discoveries allowed the western allies to thwart the Argentinian and German plans.

Elizebeth Smith Friedman’s wartime codebreaking work was so secret that she was forbidden to mention it in public. She died many years before government archives were brought to light showing what she had done. During and after World War 2, J. Edgar Hoover and the FBI took the credit for work Elizebeth and her U.S. Coast Guard team had carried out.

Advertisements

Beginnings

Clara Elizebeth Smith was born into a working class Quaker family on August 26, 1892 in the small city of Huntington, Indiana, USA. She grew up there on her parents’ small farm.

Elizebeth’s father, John Marion Smith, was a farmer, Civil War veteran, and Republican politician. He had traced his American family back to 1682, the year one of his ancestors arrived on the same ship as William Penn, the Quaker nobleman and writer after whom Pennsylvania is named.

Elizebeth’s mother was Sopha Smith (née Strock). She ran the home and cared for the family’s nine children – Elizebeth was the youngest.

Elizebeth was often quarrelsome – a trait she picked up from her father.

Education

Educated at local schools in Huntington, Elizebeth applied to several colleges hoping to study for a bachelor of arts degree. This angered her father, who believed women should marry at a young age. Elizebeth told her father she was going to college, whatever he might say, and she would pay for her own education by finding work.

Her father relented and loaned her the money she needed, but charged her six percent interest. Elizebeth took the loan, but for the rest of her life she resented what she saw as her father’s meanness in charging her interest.

In 1911, age 19, Elizebeth Smith enrolled at Ohio’s Wooster College, 200 miles from home, to study Greek and English literature.

She earned money working as a freelance seamstress – her room was always full of dresses she was working on.

In 1913, after her mother was diagnosed with cancer, Elizebeth transferred to Hillsdale College, Michigan, which was only 100 miles from home. She completed her bachelor’s degree in spring 1915, majoring in English literature with minors in languages and applied sciences.

William Shakespeare and Alfred, Lord Tennyson were her favorite authors. In philosophy classes she was inspired by the Christian humanist scholar Erasmus of Rotterdam, of whom she wrote:

“He had one faith – faith in the power of thought, in the supremacy of ideas.”

Elizebeth Smith Friedman
The Need for Erasmianism, c. 1913
 

Erasmus himself was famous for declaring:

“I am a lover of liberty. I will not and I cannot serve a party. ”

Erasmus
Spongia adversus aspergines Hutteni, 1523
 

Cracking Codes at College

Elizebeth got her first taste for ciphers at Wooster College. Her interest in Shakespeare’s plays led her to investigate the long-standing controversy about their true author. Suspecting this was Francis Bacon, Elizebeth studied Shakespeare’s works carefully, searching for hidden meanings and codes. This got her interested in the theory of cryptography – the field that deals with writing and breaking codes.

Bickering

Shortly after graduating, Elizebeth took a job as a substitute high school principal in Wabash, Indiana, 20 miles from her hometown. She soon realized that day-to-day school-life was less gripping than she had hoped. She quit the job after a year and returned to her family’s home in Huntington.

At college, Elizebeth had been infamous for her argumentativeness, often disputing her work with her professors. She now began bickering incessantly with her equally quarrelsome father. It was clear the two could not live under the same roof. In June 1916, Elizebeth boarded a train for Chicago where she hoped to find a thought-provoking job – ideally as a researcher.

Who Really Wrote William Shakespeare’s Plays?

Elizebeth Smith Friedman

Elizebeth Friedman at Riverbank.

An employment agency sent Elizebeth to Newberry Library. There she learned that an eccentric millionaire by the name of Colonel George Fabyan was seeking a cryptographer to analyze Shakespeare’s works to prove they were written by Francis Bacon. This aligned so closely with her own interests that it seemed almost too good to be true.

Colonel Fabyan offered Elizebeth a job and she moved to Riverbank, his 600 acre estate in Geneva, Illinois. There she found about 150 other researchers studying a wide range of subjects for the capricious Colonel Fabyan.

At Riverbank she soon met the man who would become her husband, William Friedman, a Ph.D. qualified geneticist hired by Colonel Fabyan to study the principles of heredity. William was Jewish and had arrived in America as a young boy with his family fleeing famine and persecution in Russia.

Elizebeth and William were each paid the same very low salary, $30 a month. On the plus side, Colonel Fabyan provided accommodation and meals. Elizebeth introduced William to cryptography and soon they were searching together for secret messages in Shakespeare’s plays.

From Literary to Military Cryptanalyst

Elizebeth and William found no codes or hidden messages. They began to doubt the value of their research. Both were ambitious people who wanted to achieve something worthwhile. They suggested to Colonel Fabyan that other work might be more fruitful. Fabyan flew into a frightening rage – a disturbing and recurrent aspect of his behavior – and ordered them back to their Shakespeare work.

Elizebeth left Riverbank at the beginning of 1917 to be with her dying mother. Following her mother’s death in February, Elizebeth returned to work.

In late 1916, Fabyan became convinced that America would soon enter World War 1. The U.S. military, however, had minimal experience of codebreaking. In early 1917, Fabyan established a cryptography team at Riverbank headed by Elizebeth and William. In March 1917, he offered its services to the government to break encrypted Morse code radio messages.

In April 1917, when America entered World War 1, all its military codebreaking work was carried out at Riverbank by Elizebeth, William, and a team that grew to 30 people.

“We had a lot of pioneering to do. Literary ciphers may give you the swing of the thing, but they are in no sense scientific… We simply had to roll up our sleeves and chart a new course.”

Elizebeth Smith Friedman
Partial Autobiography, 1966
 

Elizebeth and William married quietly in May 1917. The ceremony was performed by a rabbi. When William told his mother he had married Elizebeth, his mother collapsed in shock, ashamed that her son had married a ‘Shiksa’ – a pejorative term for a non-Jewish woman. William’s mother never came to terms with her son’s marriage, which upset both William and Elizebeth.

elizebeth-william-friedman

Elizebeth and William on their wedding day in May 1917.

A Dirty Secret

Soon after starting their war work in early 1917, Elizebeth and William decided to join the military. They were fed up of Fabyan’s unpredictable temper and controlling attitude. They sent letters to Washington D.C. offering their codebreaking services, but never heard back.

Later they learned that Fabyan had intercepted and read their incoming mail. He had destroyed job offers sent to Elizebeth and William by the military. They also learned that Fabyan had installed hidden microphones to spy on them and thwart their plans to escape from Riverbank.

In early 1918, William finally made it into the Army Signal Corps. He was sent to France in May 1918, as a first lieutenant tasked with decoding German Army messages. Elizebeth dearly wished to accompany him, but the Army refused this: working near the enemy’s lines was for men only. She remained at Riverbank, breaking codes there.

The war ended on November 10, 1918.

Although the war was over, William was ordered to stay in France. Elizebeth, her loathing for Fabyan reaching fever pitch, left Riverbank quietly without telling Fabyan. She headed back to her hometown where she found work in the town library. She also managed to make peace with her father.

In April 1919, William arrived back in America. He and Elizebeth reluctantly resumed work with Fabyan, but this time they lived in the nearby town of Geneva rather than on his Riverbank estate.

Elizebeth Friedman Breaks Organized Crime Codes for the Government

At the end of 1920, the Friedmans escaped Fabyan forever. They moved to Washington D.C. where they began working for the Army Signal Corps on January 3, 1921.

In April 1921, Elizebeth resigned to become an author and start a family. She continued with some government work from home. William continued in the Army, his fame as a cryptologist growing rapidly.

In 1925, Elizebeth, became a special agent of the U.S. Treasury. She agreed to work for them as a cryptanalyst on condition that she work from home.

This was the era of Prohibition. The Treasury was fighting organized crime gangs who were smuggling alcohol into America by the shipload. Some of the larger crime syndicates had started using highly sophisticated codes several layers deep, more complicated than any code seen in World War 1. The gangsters were also changing codes frequently: if the government broke a code, the work was quickly obsolete.

In her first three months, Elizebeth decoded messages that had remained unbroken for the previous two years.

Bodyguards Needed

In 1927, Elizebeth began working with the Bureau of Prohibition and of Customs. She attacked codes used by organized crime gangs, cracking over 12,000 messages in three years and decrypting 24 different major codes. Working from home was no longer practical and Elizebeth traveled around the USA helping customs agents.

She was the Customs Bureau’s sole cryptanalyst and by 1930 was in danger of burning herself out. Code breaking is exhausting, painstaking work; it makes demands on the intellect that have driven many codebreakers to mental illness. Some years later, during World War 2, the demands of his job pushed Elizebeth’s husband William into a distressing illness.

In 1931, she was made Cryptanalyst-in-Charge, U.S. Coast Guard; she received funds to recruit three junior codebreakers to help her. This gave her more time to work on cracking particularly challenging codes.

Elizebeth gave evidence in a number of high-profile mobster trials. Her work came with risks: the government provided her with bodyguards several times. Newspapers and magazines ran features on her and she became famous. She regretted this, because she felt her work was best done in the background.

Her evidence helped put a large number of mobsters in jail. Defense lawyers would attempt to have the court rule that her evidence was “incompetent, irrelevant, and immaterial,” because nobody could understand what she had done – she might have made the messages up herself rather than decoding anything. Elizebeth showed the defense lawyers were wrong, at times using a blackboard to explain the basics of her codebreaking to the court.

Elizebeth never consumed alcohol during Prohibition. However, she did not agree with the law – she believed it gave organized crime its first foothold in America.

“The Prohibition era took thousands of people into illicit operations who would definitely not have been underworld characters if it had not been for the unpopular feeling generally held against the law, the Volstead Act.”

Elizebeth Smith Friedman
Partial Autobiography, 1966
 

Prohibition ended in 1934, but smuggling did not. Alcohol smuggling continued, with gangs trying to evade tariffs. Narcotics and jewelry smuggling were also rife.

Elizebeth continued her work, all the while wishing she had a lower public profile. With the rise of Nazi Germany she was about to get it.

Breaking Nazi Codes

Elizebeth’s greatest contribution to World War 2 was to crack three of the Nazi’s infamous Enigma encryption machines. These machines were transmitting encrypted messages between South America and Germany.

She did this without the huge electromechanical computer invented by Alan Turing. This was possible because the German agents in South America:

  • used somewhat less sophisticated machines than those used by the Germany military
  • wrote messages over periods of time without changing the key, giving Elizebeth an entry point to breaking the code and deciphering the wiring of the Enigma machine transmitting it

She was also helped by the fact that radio operators in Germany sometimes made crazy blunders, such as transmitting the message “OK Hello” repeatedly for 15 minutes, offering a marvelous opportunity for a codebreaker to reveal the wiring of the Enigma machine sending the messages.

Enigma Machine

An Enigma Machine.

Uncovering a Plot to Nazify South America

Elizebeth learned that Argentina was co-operating with German schemes to overthrow other governments in South America and replace them with ones sympathetic to the Nazis. The Nazis hoped to develop South American bases to attack the USA from the south.

The fact that Elizebeth and her codebreaking team were reading messages between Argentina and Germany was one of the great secrets of the war – Elizebeth never talked about it. It was vital that neither Germany nor Argentina should realize their messages were being read.

This created a problem. America wanted to show the Argentinians that it knew exactly what they were up to. However, this needed to happen without the information source becoming known.

The solution again came from Elizebeth. She decoded a message revealing that a junior Argentinian diplomat was going to travel by sea from Argentina to Spain. Her work had previously shown that this man was working for the Nazis.

The Americans shared this information with the British, whose marines kidnapped the diplomat from the ship he was on, confiscated materials he was carrying to Germany, and took him back to the United Kingdom for questioning. The results of the interrogation were sufficient to hide the fact that Elizebeth and her team were the true source of information about Argentinian-German cooperation.

America told the Argentinian government that it knew all about its activities. A large force of American warships turned up a few miles from Argentina’s capital Buenos Aires. The result was that, in January 1944, the Argentinian government broke off all relations with Germany and Japan and started arresting suspected German agents.

All of this was the product of Elizebeth and her team’s work.

Personal Details and The End

In May 1917, at age 24, Elizebeth married William F. Friedman, who was 25. She introduced him to cryptology and he became an eminent cryptographer, rising to head the Army codebreaking team that deciphered the Japanese wartime Purple code – a crucial breakthrough.

Elizebeth and William had two children: Barbara, born in 1923, and John Ramsay, born in 1926.

When World War 2 ended, Elizebeth’s codebreaking days ended too. She continued in employment for a year, archiving the work she and her team had carried out. In September 1946, at age 54, her duties with the U.S. Coast Guard were complete.

After William’s retirement, he and Elizebeth returned to the work that had first brought them together. In 1957, they published a book The Shakespeare Ciphers Examined decisively refuting the claim that Francis Bacon authored Shakespeare’s plays or that there were hidden messages in them.

Elizebeth’s favorite hobby in retirement was gardening and she also enjoyed playing the piano.

William died in 1969, after which Elizebeth lived at different times with her daughter and her son.

Elizebeth Smith Friedman died of arteriosclerosis on October 31, 1980, in the Abbott Manor Nursing Home in North Plainfield, New Jersey. She was 88 years old.

Her ashes were spread over her husband’s grave at Arlington National Cemetery, Virginia. Their shared headstone bears the inscription Knowledge is Power, a phrase coined by Francis Bacon, whose theorized Shakespeare cipher first brought the couple together. A cryptanalyst to the end, Elizebeth had the letters of Knowledge is Power carved in slightly different fonts so that, in addition to saying Knowledge is Power, they encoded her husband’s initials: WFF.

Advertisements

Author of this page: The Doc
Images digitally enhanced and colorized by this website. © All rights reserved. © All rights reserved.

Cite this Page

Please use the following MLA compliant citation:

"Elizebeth Smith Friedman." Famous Scientists. famousscientists.org. 4 Sep. 2019. Web.  
<www.famousscientists.org/elizebeth-smith-friedman/>.

Published by FamousScientists.org

Further Reading
Transcipt of Elizebeth Smith Friedman interview with NBC Radio, May 25, 1934

Elonka Dunin
Cipher on the William and Elizebeth Friedman tombstone at Arlington National Cemetery is solved

G. Stuart Smith
A Life in Code: Pioneer Cryptanalyst Elizebeth Smith Friedman
McFarland & Company, 2017

Jason Fagone
The Woman Who Smashed Codes
Dey St., 2017

Acknowledgement
Original black & white photos of Friedman courtesy of the George C. Marshall Foundation

Creative Commons
Image of Erasmus courtesy of Wellcome Collection under the Creative Commons Attribution 4.0 license.

Image of Enigma Machine courtesy of Alessandro Nassiri and the Leonardo da Vinci Museum of Science and Technology under the Creative Commons Attribution-Share Alike 4.0 International license.

More from FamousScientists.org:
  • francis bacon
    Francis Bacon
  • samuel morse
    Samuel Morse
  • hypatia
    Top Women Scientists
  • erwin chargaff
    Erwin Chargaff
Advertisements

Search Famous Scientists

Scientist of the Week

  • Linda Buck: Discovered how we smell things

Recent Scientists of the Week

  • Jan Ingenhousz: Discovered photosynthesis
  • Barry Marshall: Overturned the Medical Establishment
  • Linus Pauling: Maverick Giant of Chemistry
  • William Röntgen: The Discovery of X-rays
  • Howard Florey: Brought penicillin to the world
  • Henrietta Leavitt: The key to the size of the universe
  • Archimedes: A mind beyond his time
  • Stanley Milgram: The infamous Obedience Experiments
  • C. V. Raman: Color change allows harm-free health check of living cells
  • Rosalind Franklin: Shape-shifting DNA
  • Robert Boyle: A new science is born: chemistry
  • Carl Woese: Rewrote Earth’s history of life
  • Alfred Wegener: Shunned after he discovered that continents move
  • Henri Poincaré: Is the solar system stable?
  • Polly Matzinger: The dog whisperer who rewrote our immune system’s rules
  • Otto Guericke: In the 1600s found that space is a vacuum
  • Alister Hardy: Aquatic ape theory: our species evolved in water
  • Elizebeth Friedman: Became the world’s most famous codebreaker
  • Evangelista Torricelli: We live at the bottom of a tremendously heavy sea of air
  • Eudoxus: The first mathematical model of the universe
  • James Black: Revolutionized drug design with the Beta-blocker
  • Inge Lehmann: Discovered our planet’s solid inner core
  • Chen-Ning Yang: Shattered a fundamental belief of physicists
  • Robert Hooke: Unveiled the spectacular microscopic world
  • Barbara McClintock: A Nobel Prize after years of rejection
  • Pythagoras: The cult of numbers and the need for proof
  • J. J. Thomson: Discovered the electron
  • Johannes Kepler: Solved the mystery of the planets
  • Dmitri Mendeleev: Discovered 8 new chemical elements by thinking
  • Maurice Hilleman: Record breaking inventor of over 40 vaccines
  • Marie Curie: Won – uniquely – both the chemistry & physics Nobel Prizes
  • Jacques Cousteau: Marine pioneer, inventor, Oscar winner
  • Niels Bohr: Founded the bizarre science of quantum mechanics
  • Srinivasa Ramanujan: Untrained genius of mathematics
  • Milutin Milankovic: Proved Earth’s climate is regulated by its orbit
  • Antoine Lavoisier: The giant of chemistry who was executed
  • Emmy Noether: The greatest of female mathematicians, she unlocked a secret of the universe
  • Wilder Penfield: Pioneer of brain surgery; mapped the brain’s functions
  • Charles Nicolle: Eradicated typhus epidemics
  • Samuel Morse: The telegraph and Morse code
  • Jane Goodall: Major discoveries in chimpanzee behavior
  • John Philoponus: 6th century anticipation of Galileo and Newton
  • William Perkin: Youthful curiosity brought the color purple to all
  • Democritus: Atomic theory BC and a universe of diverse inhabited worlds
  • Susumu Tonegawa: Discovered how our bodies make millions of different antibodies
  • Cecilia Payne: Discovered that stars are almost entirely hydrogen and helium

Top 100 Scientists

  • Our Top 100 Scientists

Our Most Popular Scientists

  • Astronomers
  • Biologists & Health Scientists
  • Chemists
  • Geologists and Paleontologists
  • Mathematicians
  • Physicists
  • Scientists in Ancient Times

List of Scientists

  • Alphabetical List

Recent Posts

  • Perfect Numbers and our Tiny Universe
  • What Happens when the Universe chooses its own Units?
  • Hipparchus and the 2000 Year-Old Clue
  • Darwin Pleaded for Cheaper Origin of Species
  • You Will Die For Showing I’m Wrong!
  • Getting Through Hard Times – The Triumph of Stoic Philosophy
  • Johannes Kepler, God, and the Solar System
  • Charles Babbage and the Vengeance of Organ-Grinders
  • Howard Robertson – the Man who Proved Einstein Wrong
  • Susskind, Alice, and Wave-Particle Gullibility




Alphabetical List of Scientists

Louis Agassiz | Maria Gaetana Agnesi | Al-BattaniAbu Nasr Al-Farabi | Alhazen | Jim Al-Khalili | Muhammad ibn Musa al-Khwarizmi | Mihailo Petrovic Alas | Angel Alcala | Salim Ali | Luis Alvarez | Andre Marie Ampère | Anaximander | Carl Anderson | Mary Anning | Virginia Apgar | Archimedes | Agnes Arber | Aristarchus | Aristotle | Svante Arrhenius | Oswald Avery | Amedeo Avogadro | Avicenna

Charles Babbage | Francis Bacon | Alexander Bain | John Logie Baird | Joseph Banks | Ramon Barba | John Bardeen | Charles Barkla | Ibn Battuta | William Bayliss | George Beadle | Arnold Orville Beckman | Henri Becquerel | Emil Adolf Behring | Alexander Graham Bell | Emile Berliner | Claude Bernard | Timothy John Berners-Lee | Daniel Bernoulli | Jacob Berzelius | Henry Bessemer | Hans Bethe | Homi Jehangir Bhabha | Alfred Binet | Clarence Birdseye | Kristian Birkeland | James Black | Elizabeth Blackwell | Alfred Blalock | Katharine Burr Blodgett | Franz Boas | David Bohm | Aage Bohr | Niels Bohr | Ludwig Boltzmann | Max Born | Carl Bosch | Robert Bosch | Jagadish Chandra Bose | Satyendra Nath Bose | Walther Wilhelm Georg Bothe | Robert Boyle | Lawrence Bragg | Tycho Brahe | Brahmagupta | Hennig Brand | Georg Brandt | Wernher Von Braun | J Harlen Bretz | Louis de Broglie | Alexander Brongniart | Robert Brown | Michael E. Brown | Lester R. Brown | Eduard Buchner | Linda Buck | William Buckland | Georges-Louis Leclerc, Comte de Buffon | Robert Bunsen | Luther Burbank | Jocelyn Bell Burnell | Macfarlane Burnet | Thomas Burnet

Benjamin Cabrera | Santiago Ramon y Cajal | Rachel Carson | George Washington Carver | Henry Cavendish | Anders Celsius | James Chadwick | Subrahmanyan Chandrasekhar | Erwin Chargaff | Noam Chomsky | Steven Chu | Leland Clark | John Cockcroft | Arthur Compton | Nicolaus Copernicus | Gerty Theresa Cori | Charles-Augustin de Coulomb | Jacques Cousteau | Brian Cox | Francis Crick | James Croll | Nicholas Culpeper | Marie Curie | Pierre Curie | Georges Cuvier | Adalbert Czerny

Gottlieb Daimler | John Dalton | James Dwight Dana | Charles Darwin | Humphry Davy | Peter Debye | Max Delbruck | Jean Andre Deluc | Democritus | René Descartes | Rudolf Christian Karl Diesel | Diophantus | Paul Dirac | Prokop Divis | Theodosius Dobzhansky | Frank Drake | K. Eric Drexler

John Eccles | Arthur Eddington | Thomas Edison | Paul Ehrlich | Albert Einstein | Gertrude Elion | Empedocles | Eratosthenes | Euclid | Eudoxus | Leonhard Euler

Michael Faraday | Pierre de Fermat | Enrico Fermi | Richard Feynman | Fibonacci – Leonardo of Pisa | Emil Fischer | Ronald Fisher | Alexander Fleming | John Ambrose Fleming | Howard Florey | Henry Ford | Lee De Forest | Dian Fossey | Leon Foucault | Benjamin Franklin | Rosalind Franklin | Sigmund Freud | Elizebeth Smith Friedman

Galen | Galileo Galilei | Francis Galton | Luigi Galvani | George Gamow | Martin Gardner | Carl Friedrich Gauss | Murray Gell-Mann | Sophie Germain | Willard Gibbs | William Gilbert | Sheldon Lee Glashow | Robert Goddard | Maria Goeppert-Mayer | Thomas Gold | Jane Goodall | Stephen Jay Gould | Otto von Guericke

Fritz Haber | Ernst Haeckel | Otto Hahn | Albrecht von Haller | Edmund Halley | Alister Hardy | Thomas Harriot | William Harvey | Stephen Hawking | Otto Haxel | Werner Heisenberg | Hermann von Helmholtz | Jan Baptist von Helmont | Joseph Henry | Caroline Herschel | John Herschel | William Herschel | Gustav Ludwig Hertz | Heinrich Hertz | Karl F. Herzfeld | George de Hevesy | Antony Hewish | David Hilbert | Maurice Hilleman | Hipparchus | Hippocrates | Shintaro Hirase | Dorothy Hodgkin | Robert Hooke | Frederick Gowland Hopkins | William Hopkins | Grace Murray Hopper | Frank Hornby | Jack Horner | Bernardo Houssay | Fred Hoyle | Edwin Hubble | Alexander von Humboldt | Zora Neale Hurston | James Hutton | Christiaan Huygens | Hypatia

Ernesto Illy | Jan Ingenhousz | Ernst Ising | Keisuke Ito

Mae Carol Jemison | Edward Jenner | J. Hans D. Jensen | Irene Joliot-Curie | James Prescott Joule | Percy Lavon Julian

Michio Kaku | Heike Kamerlingh Onnes | Pyotr Kapitsa | Friedrich August Kekulé | Frances Kelsey | Pearl Kendrick | Johannes Kepler | Abdul Qadeer Khan | Omar Khayyam | Alfred Kinsey | Gustav Kirchoff | Martin Klaproth | Robert Koch | Emil Kraepelin | Thomas Kuhn | Stephanie Kwolek

Joseph-Louis Lagrange | Jean-Baptiste Lamarck | Hedy Lamarr | Edwin Herbert Land | Karl Landsteiner | Pierre-Simon Laplace | Max von Laue | Antoine Lavoisier | Ernest Lawrence | Henrietta Leavitt | Antonie van Leeuwenhoek | Inge Lehmann | Gottfried Leibniz | Georges Lemaître | Leonardo da Vinci | Niccolo Leoniceno | Aldo Leopold | Rita Levi-Montalcini | Claude Levi-Strauss | Willard Frank Libby | Justus von Liebig | Carolus Linnaeus | Joseph Lister | John Locke | Hendrik Antoon Lorentz | Konrad Lorenz | Ada Lovelace | Percival Lowell | Lucretius | Charles Lyell | Trofim Lysenko

Ernst Mach | Marcello Malpighi | Jane Marcet | Guglielmo Marconi | Lynn Margulis | Barry Marshall | Polly Matzinger | Matthew Maury | James Clerk Maxwell | Ernst Mayr | Barbara McClintock | Lise Meitner | Gregor Mendel | Dmitri Mendeleev | Franz Mesmer | Antonio Meucci | John Michell | Albert Abraham Michelson | Thomas Midgeley Jr. | Milutin Milankovic | Maria Mitchell | Mario Molina | Thomas Hunt Morgan | Samuel Morse | Henry Moseley

Ukichiro Nakaya | John Napier | Giulio Natta | John Needham | John von Neumann | Thomas Newcomen | Isaac Newton | Charles Nicolle | Florence Nightingale | Tim Noakes | Alfred Nobel | Emmy Noether | Christiane Nusslein-Volhard | Bill Nye

Hans Christian Oersted | Georg Ohm | J. Robert Oppenheimer | Wilhelm Ostwald | William Oughtred

Blaise Pascal | Louis Pasteur | Wolfgang Ernst Pauli | Linus Pauling | Randy Pausch | Ivan Pavlov | Cecilia Payne-Gaposchkin | Wilder Penfield | Marguerite Perey | William Perkin | John Philoponus | Jean Piaget | Philippe Pinel | Max Planck | Pliny the Elder | Henri Poincaré | Karl Popper | Beatrix Potter | Joseph Priestley | Proclus | Claudius Ptolemy | Pythagoras

Adolphe Quetelet | Harriet Quimby | Thabit ibn Qurra

C. V. Raman | Srinivasa Ramanujan | William Ramsay | John Ray | Prafulla Chandra Ray | Francesco Redi | Sally Ride | Bernhard Riemann | Wilhelm Röntgen | Hermann Rorschach | Ronald Ross | Ibn Rushd | Ernest Rutherford

Carl Sagan | Abdus Salam | Jonas Salk | Frederick Sanger | Alberto Santos-Dumont | Walter Schottky | Erwin Schrödinger | Theodor Schwann | Glenn Seaborg | Hans Selye | Charles Sherrington | Gene Shoemaker | Ernst Werner von Siemens | George Gaylord Simpson | B. F. Skinner | William Smith | Frederick Soddy | Mary Somerville | Arnold Sommerfeld | Hermann Staudinger | Nicolas Steno | Nettie Stevens | William John Swainson | Leo Szilard

Niccolo Tartaglia | Edward Teller | Nikola Tesla | Thales of Miletus | Theon of Alexandria | Benjamin Thompson | J. J. Thomson | William Thomson | Henry David Thoreau | Kip S. Thorne | Clyde Tombaugh | Susumu Tonegawa | Evangelista Torricelli | Charles Townes | Youyou Tu | Alan Turing | Neil deGrasse Tyson

Harold Urey

Craig Venter | Vladimir Vernadsky | Andreas Vesalius | Rudolf Virchow | Artturi Virtanen | Alessandro Volta

Selman Waksman | George Wald | Alfred Russel Wallace | John Wallis | Ernest Walton | James Watson | James Watt | Alfred Wegener | John Archibald Wheeler | Maurice Wilkins | Thomas Willis | E. O. Wilson | Sven Wingqvist | Sergei Winogradsky | Carl Woese | Friedrich Wöhler | Wilbur and Orville Wright | Wilhelm Wundt

Chen-Ning Yang

Ahmed Zewail

Return to top of page

Famous Scientists - Privacy - Contact - About - Content & Imagery © 2025