Famous Physicists Of The 20th Century

The 20th century saw the world making tremendous developments in science and technology. Scientists from countries across the world were making newer discoveries and inventing technologies that would ultimately change the course of world history. Albert Einstein—one of the greatest physicists of all time—played a pivotal role in the evolution of quantum theory during the 20th century. Nobel laureate Niels Henrik David Bohr who developed the Bohr model of the atom was another physicist who made foundational contributions to understanding atomic structure and quantum theory. Nuclear physics as a distinct discipline made an emergence in the late 19th century and 20th century physicist Pierre Curie made pioneering contributions to the fields of crystallography, magnetism, piezoelectricity and radioactivity for which he was awarded the Nobel Prize. The 20th century also saw major collaborative works conducted by teams such as the Curie family of illustrious scientists. Another major collaboration was between Dutch physicist Hendrik Anthony "Hans" Kramers and Niels Bohr which led to important work on how electromagnetic waves interact with matter. Another major figure was Werner Karl Heisenberg who was one of the key pioneers of quantum mechanics. Read on to learn more about the life and works of famous Physicists of the 20th Century.

This ranking is based on an algorithm that combines various factors, including the votes of our users and search trends on the internet.

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 1 Stephen Hawking

Stephen Hawking.
Famous As: Theoretical Physicist, Cosmologist
Birthdate: January 8, 1942
Sun Sign: Capricorn
Birthplace: Oxford
Died: March 14, 2018

Stephen Hawking was an English theoretical physicist and cosmologist, who despite being afflicted motor neurone disease that severely limited his physical abilities, was able to build a phenomenally successful career. He was the first to set out a theory of cosmology explained by a union of the general theory of relativity and quantum mechanics. Hawking was ranked 25 in the BBC's poll of the 100 Greatest Britons, in 2002.

 2 Albert Einstein

Albert Einstein.
Famous As: Physicist
Birthdate: March 14, 1879
Sun Sign: Pisces
Birthplace: Ulm, Germany
Died: April 18, 1955
Deemed as the most influential physicist of the 20th century, the German-born physicist Albert Einstein was one of the greatest minds to have ever lived. Even his name is now synonymous with the term genius. The father of Modern Physics is credited with developing the theory of relativity and explaining the photoelectric effect. The latter won him the Nobel Prize.
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 3 Nikola Tesla

Nikola Tesla.
Famous As: Inventor
Birthdate: July 10, 1856
Sun Sign: Cancer
Birthplace: Smiljan, Croatia
Died: January 7, 1943

Inventor, engineer and futurist, Nikola Tesla, is best remembered for his contribution to the development of the modern alternating current (AC) electricity supply system. A prolific inventor, he had around 300 patents for his inventions. Even though he earned a considerable amount of money, he had poor money management skills and died a poor man.

 4 Marie Curie

Marie Curie.
Famous As: Physicist
Birthdate: November 7, 1867
Sun Sign: Scorpio
Birthplace: Warsaw, Poland
Died: July 4, 1934
Amongst the most notable scientists of her time, the first woman to win a Nobel Prize, the sole person to win two Nobel Prize in two different category, and the first woman professor at the University of Paris—Marie Curie’s list of achievements is incredible. She did extensive research in the field of radioactivity and discovered polonium and radium.

 5 Richard Feynman

Richard Feynman.
Famous As: Physicist
Birthdate: May 11, 1918
Sun Sign: Taurus
Birthplace: Manhattan, New York City, New York, United States
Died: February 15, 1988

Theoretical physicist Richard Feynman won the Nobel Prize in Physics in 1965, along with Julian Schwinger and Shin'ichirō Tomonaga, for his research on quantum electrodynamics. He also contributed to the development of the atomic bomb. Feyman made it to Physics World’s list of the 10 greatest physicists of all time.

 6 J. Robert Oppenheimer

J. Robert Oppenheimer.
Birthdate: April 22, 1904
Sun Sign: Taurus
Birthplace: New York City, United States
Died: February 18, 1967

Hailed as a brilliant scientific mind, American physicist J Robert Oppenheimer, led the Manhattan Project which resulted in the development of atomic bomb during the World War II. The bombs were dropped on the Japanese cities of Hiroshima and Nagasaki in 1945. However, Oppenheimer was in a constant conflict over the moral issue of the weapons of mass destruction and rallied against nuclear proliferation.

 7 Werner Heisenberg

Werner Heisenberg.
Famous As: Physicist
Birthdate: December 5, 1901
Sun Sign: Sagittarius
Birthplace: Würzburg
Died: February 1, 1976
German theoretical physicist Werner Heisenberg is best known for pioneering quantum mechanics. He received the 1932 Nobel Prize in Physics. He had also helped Germany plan nuclear weapon strategies during World War II and was the director of what is now known as the Max Planck Institute for Physics.
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 8 Subrahmanyan Chandrasekhar

Subrahmanyan Chandrasekhar.
Birthdate: October 19, 1910
Sun Sign: Libra
Birthplace: Lahore, British India
Died: August 21, 1995

Remembered for his varied contribution to astrophysics, Subrahmanyan Chandrasekhar is perhaps best known for his work on the evolution of massive stars. Today known as Chandrasekhar limit, it contributed to final understanding of supernovas, neutron stars, and black holes. A prolific writer, he also did significant work on energy transfer by radiation in stellar atmospheres and convection on solar surface.

 9 Enrico Fermi

Enrico Fermi.
Famous As: Nobel Laureate in Physics
Birthdate: September 29, 1901
Sun Sign: Libra
Birthplace: Rome, Italy
Died: November 28, 1954
Italian physicist Enrico Fermi created the Chicago Pile-1, the world's first nuclear reactor. Known widely as the "architect of the atomic bomb," he was equally proficient in theoretical and experimental physics, and won the 1938 Nobel Prize in Physics for his work on radioactivity and for discovering transuranium elements.

 10 Homi Bhabha

Homi Bhabha.
Famous As: Indian physicist
Birthdate: October 30, 1909
Sun Sign: Scorpio
Birthplace: Mumbai, India
Died: January 24, 1966

Padma Bhushan-winning physicist Homi Bhabha revolutionized the Indian nuclear program singlehandedly. Born into an affluent family, he was educated at Cambridge. Initially geared toward a career in mechanical engineering, he later drifted to physics, eventually contributing to the formation of TIFR. The Bhabha Atomic Research Centre is named after him.

 11 Paul Dirac

Paul Dirac.
Famous As: Physicist
Birthdate: August 8, 1902
Sun Sign: Leo
Birthplace: Bristol
Died: October 20, 1984

English theoretical physicist and Nobel laureate Paul Dirac OM FRS, counted among leading physicists of the 20th century, made fundamental contributions in the early development of quantum electrodynamics and quantum mechanics. He derived the Dirac equation while the modern theory of antimatter began with one of his papers. His book The Principles of Quantum Mechanics remains an influential monograph on the subject.

 12 Wolfgang Pauli

Wolfgang Pauli.
Famous As: Nobel Laureate in Physics
Birthdate: April 25, 1900
Sun Sign: Taurus
Birthplace: Vienna, Austria
Died: December 15, 1958

Nobel Prize-winning Austrian physicist Wolfgang Pauli is remembered for his contribution to quantum physics and for laying down the Pauli principle. While he was initially married to a cabaret dancer, the marriage ended in a divorce after a year. His written works are considered classics in science.

 13 Murray Gell-Mann

Murray Gell-Mann.
Famous As: Physicist
Birthdate: September 15, 1929
Sun Sign: Virgo
Birthplace: Manhattan, New York City, U.S.
Died: May 24, 2019

Nobel Prize-winning American physicist Murray Gell-Mann is best remembered for his research on elementary particles. The Yale and MIT alumnus later taught at Caltech and is credited with coining the terms "quark" and "strangeness" in quantum physics. A linguistic enthusiast, he also co-established the Evolution of Human Languages program.

 14 Vikram Sarabhai

Vikram Sarabhai.
Famous As: Scientist
Birthdate: August 12, 1919
Sun Sign: Leo
Birthplace: Ahmedabad, India
Died: December 30, 1971

Padma Bhushan- and Padma Vibhushan-winning Indian scientist Vikram Sarabhai was born into the famous Sarabhai family of industrialists who were associated with the Indian Independence Movement. He made major contributions to India’s nuclear power and space research initiatives, developed textile research in India, and helped set up IIM-Ahmedabad.

 15 Sally Ride

Sally Ride.
Famous As: Physicist, Astronaut
Birthdate: May 26, 1951
Sun Sign: Gemini
Birthplace: Los Angeles, California, U.S.
Died: July 23, 2012
Astronaut and physicist Sally Ride was the first American woman and the youngest American astronaut to enter space. Following her death, it was revealed that she had been in a 27-year lesbian relationship with tennis player and professor Tam O'Shaughnessy. Sally herself was a ranked junior tennis player, too.

 16 Michio Kaku

Michio Kaku
Famous As: Theoretical physicist, Science writer, Popularizer of science, Futurist, University teacher, Non-fiction writer, Radio personality
Birthdate: January 24, 1947
Sun Sign: Aquarius
Birthplace: San Jose

Apart from teaching at the City College of New York, theoretical physicist Michio Kaku also often pens his thoughts in blogs and has written several bestselling books, such as The God Equation. His research is focused on the string theory. He also believes in the existence of aliens.

 17 Carl Sagan

Carl Sagan.
Famous As: Astronomer, Astrophysicist, Writer
Birthdate: November 9, 1934
Sun Sign: Scorpio
Birthplace: Brooklyn, New York, U.S.
Died: December 20, 1996
Pulitzer- and Emmy-winning astrophysicist and author Carl Sagan was best known for co-writing the TV series Cosmos: A Personal Voyage. His novel Contact was adapted into a film. He was known for his extensive research on extra-terrestrial life, had taught at major universities, and written countless papers and science books.

 18 John G. Trump

John G. Trump
Famous As: Scientist
Birthdate: August 21, 1907
Sun Sign: Leo
Birthplace: New York, New York, United States
Died: February 21, 1985

Better known as former U.S. president Donald Trump’s uncle, John G. Trump was an MIT physicist and engineer. Though he had initially aspired to be an architect and join his brother Fred’s real-estate business, John later concentrated on his research that led to the invention of high-voltage generators.

 19 Louis Slotin

Louis Slotin.
Famous As: Physicist
Birthdate: December 1, 1910
Sun Sign: Sagittarius
Birthplace: Winnipeg, Canada
Died: May 30, 1946
While showing his colleagues how to work on a plutonium bomb, Canadian scientist Louis Slotin was exposed to a lethal radioactive dose that first caused him to vomit and then die 9 days later. He had, however, reportedly shielded his colleagues from maximum exposure, thus saving their lives.

 20 Kip Thorne

Kip Thorne.
Famous As: Physicist
Birthdate: June 1, 1940
Sun Sign: Gemini
Birthplace: Logan

American theoretical-physicist Kip Thorne, who is noted for his contributions in gravitational physics and astrophysics, is known for Thorne-Żytkow object, Thorne-Hawking-Preskill bet, LIGO, gravitational waves and the book Gravitation. Thorne along with Rainer Weiss and Barry C. Barish received the Nobel Prize in Physics in 2017 for their contributions to the LIGO detector and the observation of gravitational waves.

 21 Walter Lewin

Walter Lewin
Famous As: Astronomer, University teacher, Astrophysicist, Physicist
Birthdate: January 29, 1936
Sun Sign: Aquarius
Birthplace: The Hague

 22 Bernhard Caesar Einstein

Bernhard Caesar Einstein
Famous As: Physicist, Engineer
Birthdate: July 10, 1930
Sun Sign: Cancer
Birthplace: Dortmund
Died: September 30, 2008

Swiss-American physicist and engineer Bernhard Caesar Einstein was better known as the only grandchild of Albert Einstein to have survived beyond childhood. While two of his biological brothers died in infancy, his parents adopted a girl child, too. He grew up to work on night vision and laser technology.

 23 Ronald McNair

Ronald McNair
Famous As: Physicist, Astronaut
Birthdate: October 21, 1950
Sun Sign: Libra
Birthplace: Lake City
Died: January 28, 1986

A doctorate in physics from MIT Cambridge, Ronald McNair worked on chemical lasers before joining NASA and in 1984 flew as a mission specialist on STS-41-B aboard Challenger, becoming the second African-American to do so. In January 1986, he was selected to fly on STS-51-L, but was killed along with rest of the crews when Challenger disintegrated soon after liftoff.

 24 Klaus Fuchs

Klaus Fuchs.
Famous As: Theoretical Physicist and Atomic Spy
Birthdate: December 29, 1911
Sun Sign: Capricorn
Birthplace: Rüsselsheim, German Empire
Died: January 28, 1988

German theoretical physicist Klaus Fuchs worked on many significant theoretical calculations relating to the first nuclear weapons. He was also an atomic spy who provided information about nuclear weapons production to the Soviet Union during World War II. He was convicted and jailed for nine years, following which he resumed his career as a physicist.

 25 Lev Landau

Lev Landau.
Famous As: Physicist
Birthdate: January 22, 1908
Sun Sign: Aquarius
Birthplace: Baku, Baku Governorate, Russian Empire
Died: April 1, 1968

Nobel Prize-winning Russian physicist Lev Landau is remembered for his pathbreaking research in quantum mechanics. A math prodigy, he had learned calculus at 13. He failed to receive his Nobel in person due to a near-fatal car crash which caused him injuries that eventually caused his death 6 years later.

 26 Edward Teller

Edward Teller.
Famous As: physicist
Birthdate: January 15, 1908
Sun Sign: Capricorn
Birthplace: Budapest, Hungary
Died: September 9, 2003

Edward Teller was one of the famous "Martians,” or eminent Hungarian scientists who had migrated to the U.S. A prominent chemical engineer and nuclear physicist, he was part of the team that created the world’s first atomic bomb and also designed the first hydrogen bomb, or thermonuclear bomb.

 27 Ernest Lawrence

Ernest Lawrence.
Famous As: Physicist
Birthdate: August 8, 1901
Sun Sign: Leo
Birthplace: Canton, South Dakota, United States
Died: August 27, 1958

 28 William Shockley

William Shockley.
Famous As: Physicist
Birthdate: February 13, 1910
Sun Sign: Aquarius
Birthplace: Greater London, England, United Kingdom
Died: August 12, 1989

American physicist, inventor and Nobel laureate William Bradford Shockley Jr received the Nobel Prize in Physics with John Bardeen and Walter Brattain in 1956 for their researches on semiconductors and for discovering the transistor effect while working at the Bell Labs. He later became a proponent of eugenics while serving as a professor of electrical engineering at Stanford University.

 29 Andrei Sakharov

Andrei Sakharov.
Famous As: The Father of Soviet nuclear bomb’
Birthdate: May 21, 1921
Sun Sign: Gemini
Birthplace: Moscow
Died: December 14, 1989

Andrei Sakharov was a Russian dissident and nuclear physicist best remembered for designing RDS-37, Soviet Union's first two-stage hydrogen bomb. Also an activist for peace and human rights, Andrei Sakharov was honored with the Nobel Peace Prize in 1975. The Sakharov Prize for Freedom of Thought, which is awarded by the European Parliament, is named in his honor.

 30 Anatoli Bugorski

Anatoli Bugorski
Famous As: physicist, nuclear scientist
Birthdate: June 25, 1942
Sun Sign: Cancer

 31 John Bardeen

John Bardeen.
Famous As: Nobel Laureate in Physics
Birthdate: May 23, 1908
Sun Sign: Gemini
Birthplace: Madison, Wisconsin, United States
Died: January 30, 1991

American engineer, physicist and Nobel laureate John Bardeen is the only person who received the Nobel Prize in Physics twice. He shared the first Nobel with William Shockley and Walter Brattain in 1956 for inventing the transistor, and the second with Leon N Cooper and John Robert Schrieffer in 1972 for proposing the BCS theory, a microscopic theory of superconductivity.

 32 Ashton Carter

Ashton Carter
Birthdate: September 24, 1954
Sun Sign: Libra
Birthplace: Philadelphia

Yale and Oxford alumnus Ashton Carter had interestingly bagged his first job at a car wash at 11. He grew up to teach at Harvard and Stanford and also served as the U.S. Secretary of Defense under Barack Obama. The physicist now heads the Belfer Center for Science at Harvard.

 33 Robert H. Goddard

Robert H. Goddard.
Famous As: Physicist
Birthdate: October 5, 1882
Sun Sign: Libra
Birthplace: Worcester, Massachusetts, United States
Died: August 10, 1945

The son of a machine shop owner, Robert H. Goddard grew up to become a pioneer of rocketry. Interested in physics and mechanics since childhood, he dreamed of space flight. He developed the world’s first rocket that ran on liquid fuel. NASA's Goddard Space Flight Center is named after him.

 34 Cédric Villani

Cédric Villani
Famous As: Mathematician, Physicist, University teacher
Birthdate: October 5, 1973
Sun Sign: Libra
Birthplace: Brive-la-Gaillarde

Fields Medal-winning French politician and mathematician Cédric Villani works mainly on mathematical physics, partial differential equations and Riemannian geometry. He serves as Member of the National Assembly for Essonne's 5th constituency, after being elected during the 2017 legislative election. He was a member of La République En Marche! but defected later to form the political party Ecology, Democracy, Solidarity.  

 35 Thomas Kuhn

Thomas Kuhn.
Famous As: Physicist, Philosopher
Birthdate: July 18, 1922
Sun Sign: Cancer
Birthplace: Cincinnati, Ohio, United States
Died: June 17, 1996

American philosopher of science Thomas Kuhn is noted for his book on history of science, The Structure of Scientific Revolutions, publication of which marked a significant event in the history, philosophy, and sociology of science. He presented his notion of paradigm shift and identified and elaborated on normal science in this book which remained influential in academic and popular circles.

 36 Brian Greene

Brian Greene
Famous As: Physicist, Writer, Professor, Author, Actor, Theoretical physicist
Birthdate: February 9, 1963
Sun Sign: Aquarius
Birthplace: New York City

American theoretical physicist, mathematician, and string theorist Brian Greene is noted for popularising string theory through his books like The Elegant Universe, and The Fabric of the Cosmos and related PBS television specials. Greene taught as professor of physics at Cornell University, and presently serves as a professor at Columbia University. He is the co-founder and chairman of the World Science Festival.

 37 Edward Witten

Edward Witten
Famous As: Mathematician, Physicist, University teacher, Theoretical physicist
Birthdate: August 26, 1951
Sun Sign: Virgo
Birthplace: Baltimore

American mathematical and theoretical physicist Edward Witten is regarded as the practical founder of M-theory. His proof of positive energy theorem led him to become the first physicist who received the Fields Medal by International Mathematical Union. His research works mainly include the areas of string theory, supersymmetric quantum field theories and quantum gravity, besides other areas of mathematical physics.  

 38 Steven Chu

Steven Chu.
Famous As: Former United States Secretary of Energy
Birthdate: February 28, 1948
Sun Sign: Pisces
Birthplace: St. Louis

American physicist, politician and Nobel laureate Steven Chu, who served as United States Secretary of Energy, presently serves as Professor of Physics and Professor of Molecular and Cellular Physiology at Stanford University. His research on cooling and trapping of atoms with laser light led him to share the 1997 Nobel Prize in Physics with William Daniel Phillips and Claude Cohen-Tannoudji.

 39 Abdus Salam

Abdus Salam.
Famous As: Theoretical Physicist
Birthdate: January 29, 1926
Sun Sign: Aquarius
Birthplace: Sahiwal
Died: November 21, 1996

Abdus Salam was a Pakistani theoretical physicist who became the first Pakistani to be honored with the Nobel Prize in Physics. He was also the second person from an Islamic country to receive any Nobel Prize. He won the award in 1979 for his work concerning the electroweak unification theory. Salam played a major role in popularizing physics in Pakistan.

 40 David Bohm

David Bohm.
Famous As: Scientist
Birthdate: December 20, 1917
Sun Sign: Sagittarius
Birthplace: Wilkes-Barre, Pennsylvania, United States
Died: October 27, 1992
Born to Jewish immigrants, David Bohm went against his father’s wish of joining his family’s furniture business and ventured into science instead. He later grew up to be an influential physicist and is now revered for his contribution to quantum mechanics and for introducing concepts such as Bohm’s diffusion.

 41 Steven Weinberg

Steven Weinberg.
Birthdate: May 3, 1933
Sun Sign: Taurus
Birthplace: New York City, USA

Nuclear physicist and Nobel laureate Steven Weinberg is known for establishing the electroweak theory, along with Sheldon Lee Glashow and Abdus Salam. He was born to Jewish immigrants in New York and made it to Cornell and Princeton. He is an atheist and supports the Israeli cause.

 42 John Archibald Wheeler

John Archibald Wheeler.
Famous As: Physicist
Birthdate: July 9, 1911
Sun Sign: Cancer
Birthplace: Jacksonville
Died: April 13, 2008

American theoretical-physicist John Archibald Wheeler, who worked as professor of physics at Princeton University for most of his career, is best-known for co-developing the concept of Breit–Wheeler process, popularising the term black hole, and helping in designing and building the hydrogen bomb. He also invented several terms like quantum foam and wormhole, and hypothesized the one-electron universe.

 43 Jocelyn Bell Burnell

Jocelyn Bell Burnell
Famous As: Astronomer, Astrophysicist
Birthdate: July 15, 1943
Sun Sign: Cancer
Birthplace: Belfast

Jocelyn Bell Burnell is an astrophysicist from Northern Ireland. As a postgraduate student, she discovered the first radio pulsars. She graduated from the University of Glasgow and pursued an academic career. In 2018, she received the Special Breakthrough Prize in Fundamental Physics for her discovery of radio pulsars. She donated the three million dollars she received as prize money.  

 44 Luis Walter Alvarez

Luis Walter Alvarez.
Famous As: Physicist
Birthdate: June 13, 1911
Sun Sign: Gemini
Birthplace: San Francisco
Died: September 1, 1988

Experimental physicist and Nobel laureate Luis Walter Alvarez is best remembered for inventing the liquid hydrogen bubble chamber, which enabled the discovery of countless short-lived resonance particles. The University of California, Berkeley professor and MIT scientist had also been part of the development of the atomic bomb.

 45 Fred Hoyle

Fred Hoyle
Famous As: Astronomer
Birthdate: June 24, 1915
Sun Sign: Cancer
Birthplace: Bingley, England
Died: August 20, 2001

Fred Hoyle was an English astronomer known for his theory of stellar nucleosynthesis. He spent most of his career at the Institute of Astronomy at Cambridge, serving as its director for six years. He was also an author of science fiction novels, short stories, and plays and appeared in a series of radio talks on astronomy for the BBC.  

 46 Rajnath Singh

Rajnath Singh
Famous As: Politician
Birthdate: July 10, 1951
Sun Sign: Cancer
Birthplace: Chandauli district

The current Indian defense minister Rajnath Singh has previously held other important portfolios, such as home affairs and agriculture. He has also been a BJP president and the chief minister of Uttar Pradesh. Born into a farmer’s family, he worked as a physics lecturer before he joined the RSS.

 47 Jayant Narlikar

Jayant Narlikar
Famous As: Physicist, Astronomer, Astrophysicist, Scientist, University teacher, Science fiction writer
Birthdate: July 19, 1938
Sun Sign: Cancer
Birthplace: Kolhapur

Born to a math professor father and a Sanskrit scholar mother, Astrophysicist and IUCAA professor Jayant Narlikar grew up to collaborate with Sir Fred Hoyle, leading to the conformal gravity theory, also known as the Hoyle-Narlikar theory. He has won the Padma Bhushan and Padma Vibhushan and penned sci-fi novels, too.

 48 Frédéric Joliot-Curie

Frédéric Joliot-Curie.
Famous As: Physicist
Birthdate: March 19, 1900
Sun Sign: Pisces
Birthplace: Paris
Died: August 14, 1958

Frédéric Joliot-Curie was a French physicist whose discovery of artificial radioactivity earned him the 1935 Nobel Prize in Chemistry, which was jointly awarded to Frédéric and his wife Irène Joliot-Curie. Along with his wife, Frédéric is credited with founding the Orsay Faculty of Sciences, a physics and mathematics school within Paris-Saclay University. He had also won the Stalin Peace Prize.

 49 Hans Bethe

Hans Bethe.
Famous As: Physicist
Birthdate: July 2, 1906
Sun Sign: Cancer
Birthplace: Strasbourg
Died: March 6, 2005

A physiology professor’s son, Hans Bethe had shown immense talent in math as a child. The German-American theoretical physicist and Cornell professor was a pioneer of quantum physics and later won the Nobel Prize for Physics for his research on stellar nucleosynthesis, or the formation of energy in stars.

 50 David D. Friedman

David D. Friedman
Famous As: Economist, Physicist, Blogger, Writer, University teacher
Birthdate: February 12, 1945
Sun Sign: Aquarius
Birthplace: New York City

Eminent scholar David D. Friedman has excelled in a wide range of academic areas, including economics, physics, law, and business. The Harvard alumnus is best known for his anarcho-capitalist theories and the book The Machinery of Freedom but has penned countless other books, too, including two science-fiction fantasy novels.