Michael Faraday was an English scientist known for his contribution to the study of electrochemistry and electromagnetism. Considered one of the most influential scientists ever, Faraday's inventions of electromagnetic rotary devices established the basis for electric motor technology. His research also helped understand the concept of the electromagnetic field. Ernest Rutherford called him one of the greatest scientific discoverers ever.
New Zealand physicist Ernest Rutherford is remembered as the father of nuclear physics. His discovery of radioactive half-life and of radon, and his differentiation of alpha and beta radiation, won him the Nobel Prize in Chemistry in 1908. Element 104 was named rutherfordium in his honor.
John Dalton was an English chemist, physicist, and meteorologist most famous for introducing the atomic theory into chemistry. He also contributed a lot to the study of color blindness, sometimes referred to as Daltonism in his honor. He was the first scientist to refer to the smallest particle of matter as an “atom.” He was a Quaker and lived modestly.
Antoine Lavoisier was a French chemist and nobleman. He played a crucial role during the chemical revolution of the 18th-century. Widely regarded as the father of modern chemistry, Lavoisier had a major influence on the history of biology as well as the history of chemistry. He also helped build the metric system.
Apart from being a pioneer of Indology and geodesy, Persian scholar Abū Rayḥān al-Bīrūnī also worked on subjects such as anthropology, math, and ethnography. It is believed he didn’t know his father. He had penned many works, such as the encyclopaedic volume The Chronology of Ancient Nations.
Bernhard Riemann was a German mathematician best remembered for his contributions to number theory, analysis, and differential geometry. His paper on the prime-counting function, which was published in 1859, is considered one of the most influential papers in the history of analytic number theory. Riemann is widely regarded as one of the greatest mathematicians ever.
Computer scientist, Dennis MacAlistair Ritchie, worked at Bell Labs Computing Sciences Research Center for most of his career, co-developing the Unix operating system and B programming language with Kenneth Thompson, co-winning the 1983 A.M. Turing Award for it. Earlier, he had also created C programming language and was involved with the development of the Plan 9 and Inferno operating systems.
Born into an affluent family, French mathematician Adrien-Marie Legendre probably never had to earn a living till the beginning of the French Revolution. Excelling in math and physics, he later contributed to areas such as elliptic functions, developed the least squares method, and lent his name to Legendre polynomials.
A descendant of Pennsylvania founder William Penn through his mother, Hermann von Helmholtz studied medicine, pushed by his father, in spite of being interested in the natural sciences. Best known for his law of conservation of energy, he coalesced the fields of medicine, physiology, math, and physics in his studies.
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.
Maria Montessori was an Italian educator and physician best known for developing the Montessori method of education, a student-friendly method, which is being used in several public and private schools around the world. In 2020, she was nominated by Time magazine as one of their Top 100 Women of the year.
American mathematician Dorothy Vaughan was also known as a "human computer." Initially a math teacher, she became the first African-American supervisor of NACA, later part of NASA, at a time when racial segregation was rampant in the U.S. Her contribution to the early American space programs is invaluable.
15 Judea Pearl
A.M. Turing Award-winning Israeli-American computer scientist Judea Pearl is known for his work on artificial intelligence and for creating the Bayesian network. He has penned several books on causality, too. He is also known as the father of Daniel Pearl, the journalist who was beheaded by Islamic terrorists in Pakistan.
Marie Curie and Pierre Curie’s daughter, Irène Joliot-Curie, herself a brilliant scientist, won the 1935 Nobel Prize in Chemistry, along with her husband, Joliot-Curie, for discovering artificial radioactivity. She was also one of the first three female French government members. She tragically died of leukemia caused by exposure to radiation.
Stephen Jay Gould was an American evolutionary biologist, paleontologist, and historian of science. One of the most widely read and influential authors of popular science, Gould was named a Living Legend in April 2000 by the US Library of Congress. He is also counted among the most frequently cited scientists, as far as evolutionary theory is concerned.
American physicist Arthur Compton is best-known for introducing Compton wavelength, discovering Compton scattering, first identifying the Compton–Getting effect in the intensity of cosmic rays along with Ivan A. Getting, and for the Compton generator. He received the Nobel Prize in Physics in 1927 for discovering Compton effect. He also remained a prominent figure during the Manhattan Project.
22 Sylvia Earle
Konstantin Tsiolkovsky was a Russian rocket scientist. Credited with pioneering astronautic theory, Tsiolkovsky is widely regarded as one of the founding fathers of astronautics and modern rocketry. His works served as an inspiration to several other Soviet rocket engineers like Valentin Glushko and Sergei Korolev. Hence, Konstantin Tsiolkovsky's work played an influential role in the Soviet space program.
26 Walter Reed
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.
Wilhelm Ostwald was a Baltic German philosopher and chemist who is credited with co-founding the field of physical chemistry. A polymath, Ostwald made significant contributions to philosophy, art, and politics, especially after his retirement from academic life. His contributions to the fields of reaction velocities, chemical equilibria, and catalysis earned him the 1909 Nobel Prize in Chemistry.
Mark Shuttleworth is a South African-British entrepreneur. He is credited with founding Canonical, the company that developed the popular Linux-based Ubuntu operating system. Mark Shuttleworth became the first African from an independent country and the first South African to travel to space; he traveled as a space tourist in 2002.
30 Wen Jiabao
Wen Jiabao is a retired Chinese politician who served as the country's head of government from 2003 to 2013. As Premier, Wen Jiabao played a major role in directing Beijing's economic policy. Nicknamed the people's premier, Wen worked towards bettering the lives of migrant workers and farmers rather than focusing on GDP growth in rich coastal areas and large cities.
Luigi Galvani was an Italian physician, biologist, physicist, and philosopher. He is credited with the discovery of animal electricity and is considered a pioneer of bioelectromagnetics. He and his wife made one of the first forays into the study of bioelectricity when they discovered that the muscles of dead frogs' legs twitched when struck by an electrical spark.
Georges Cuvier was a French zoologist and naturalist. A major figure in the early 19th century's research of natural sciences, Cuvier played an important role in establishing the fields of comparative paleontology and anatomy by comparing fossils with living animals, for which he is sometimes regarded as the founding father of paleontology.
French mathematician and philosopher Marquis de Condorcet was a champion for liberal economy and women’s rights. He was a significant contributor of the Encyclopédie and was part of the Academy of Sciences. He is also remembered for his political activities in the wake of the French Revolution.
38 Peter Sunde
Johann Heinrich Lambert was a Swiss polymath whose contributions to the fields of physics, mathematics, map projections, astronomy, and philosophy are considered important by many scholars. He is credited with introducing hyperbolic functions into trigonometry. He is also credited with inventing a hygrometer, which is used to measure the quantity of water vapor in soil and air.
Georges-Louis Leclerc, Comte de Buffon was a French mathematician, encyclopédiste, cosmologist, and naturalist. He is best known for authoring and publishing Histoire Naturelle, an encyclopaedic collection of 36 volumes, which he worked on for 50 years. His work had a strong influence on two subsequent generations of naturalists, including popular French scientists like Georges Cuvier and Jean-Baptiste Lamarck.
47 Albert Sabin
48 Rudolf Vrba
49 Carl Zeiss
Maurice Hilleman was an American microbiologist who developed more than 40 vaccines. His vaccines save almost eight million lives every year and he is regarded as one of the most important vaccinologists of all time. He also played a major role in the discovery of antigenic drift and shift. In 1988, he was honored with the National Medal of Science.