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.
One of the most influential and popular scientists of all time, Sir Isaac Newton played a prominent role in our understanding of natural phenomena. He formulated the law of universal gravitation and laws of motion. He also developed the Newtonian telescope among other devices. Apart from science, Newton was also intrigued by religion, occult, and alchemy.
A self-taught genius Indian mathematician, Srinivasa Ramanujan is known for his contributions to mathematical analysis, number theory and continued fractions. Born into a humble family, the celebrated mathematician struggled with poverty but still managed to publish first of his papers in the Journal of the Indian Mathematical Society. Later, his collaboration with English mathematician G. H. Hardy proved very productive.
This 17th-century German mathematician, astronomer, and astrologer is remembered for his pathbreaking work on optics. He invented a developed version of the refracting telescope. He also laid down Kepler's laws of planetary motion and wrote Astronomia Nova, Harmonices Mundi, and Epitome Astronomiae Copernicanae.
Best known for working with Albert Einstein to form Bose–Einstein statistics, Indian scientist Satyendra Nath Bose was a master of quantum mechanics. He played the esraj, loved poetry, and had mastered quite a few languages. The Padma Vibhushan winner was also made a Fellow of The Royal Society.
British naturalist Alfred Russel Wallace is largely remembered for his theory of evolution through natural selection, which inspired Charles Darwin’s studies. He began his career as a surveyor’s apprentice and later introduced concepts such as reinforcement in animals, also known as the Wallace effect. He was awarded the Order of Merit.
Remembered as versatile mathematician, game wizard and polymath, John Horton Conway had limitless curiosity, which matched with his scientific originality. Although he is best known for devising the cellular automation called Game of Life, he made significant contributions to group theory, number theory, algebra, geometric topology, theoretical physics, combinatorial game theory and geometry. Conway published many outstanding papers in these fields.
English physicist, and mathematician, James Prescott Joule primarily worked on the nature of heat, in course of which he established that all forms of energy are fundamentally same and therefore inter-convertible. His findings resulted in the development of the first law of thermodynamics and negation of calorie theory. The SI derived unit of energy, the joule, is named after him.
Arthur Eddington was an English physicist, astronomer, and mathematician. He wrote numerous articles that explained Albert Einstein's theory of general relativity to the English-speaking world. He began his career in academics and eventually shifted to astronomy, becoming the chief assistant to the Astronomer Royal at the Royal Greenwich Observatory. He was a recipient of the Henry Draper Medal.
14 Isaac Asimov
Isaac Asimov was an American writer. Best known for his science fiction works, Asimov was regarded as one of the Big Three writers along with Arthur C. Clarke and Robert A. Heinlein. Asimov is credited with influencing most sci-fi writers since the 1950s. Nobel Prize winner Paul Krugman stated that one of Asimov's works inspired him to take up Economics.
15 Dian Fossey
Born into a family of drug merchants, Jacob Bernoulli was forced to study theology by his father but later deviated to math. He taught math and laid down the Bernoulli’s equation and calculus of variations. Apart from him and his brother, Johann Bernoulli, his family later produced more great mathematicians.
Born into a poor family in British India, Har Gobind Khorana studied on scholarships and later bagged a seat at the University of Liverpool and thus moved to England. The renowned biochemist ended up winning the Nobel Prize for his research on how nucleotides in nucleic acids control protein synthesis.
19 Tony Hoare
Tony Hoare is a British computer scientist who is credited with developing the sorting algorithm quicksort. He is also credited with developing Hoare logic, a formal system for verifying program correctness. Over the years, Tony Hoare has received several prestigious awards for his contribution to computer science.
20 James Watt
Swiss chemist Albert Hofmann was the first known person to synthesize the psychedelic effects of lysergic acid diethylamide (LSD). Interested in science from a young age, he studied chemistry at the University of Zürich. As a chemist, he conducted several significant studies and authored more than 100 scientific articles and books. He was a recipient of the prestigious Scheele Award.
23 Klaus Fuchs
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.
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.
26 Donald Knuth
Mathematician and computer scientist Donald Ervin Knuth is best known for his contribution to the development of the rigorous analysis of the computational complexity of algorithms. Also the creator of the TeX computer typesetting system as well as the WEB and CWEB computer programming systems, he has published twenty books, most significant among them being The Art of Computer Programming.
27 Tu Youyou
Chinese phytochemist and malariologist Tu Youyou is best remembered for her Nobel Prize-winning discovery of the anti-malarial drug qinghaosu, or artemisinin. She is the first Chinese female Nobel laureate. A tuberculosis infection in her younger days had inspired her to step into medicine. She later studied traditional Chinese medicine, too.
American physician-scientist and immunologist Anthony Fauci serves as director of National Institute of Allergy and Infectious Diseases (NIAID) and Chief Medical Advisor to President Joe Biden. As research scientist and chief of NIAID, Fauci contributed in the areas of HIV/AIDS research and other immunodeficiency diseases and received Presidential Medal of Freedom for his work on the AIDS relief program PEPFAR.
30 René Girard
René Girard was a French philosopher of social science, literary critic, and historian. Over the years, Girard's work has had an influence on disciplines like philosophy, anthropology, psychology, mythology, theology, economics, sociology, and cultural studies among other important disciplines. In 2006, René Girard was honored by the University of Tübingen with the prestigious Dr. Leopold Lucas Prize.
32 Aldo Leopold
34 John Lilly
Born to rich Catholic parents, John Lilly spent his childhood treating science as a hobby. While studying medicine, he performed gruelling medical experiments on himself. He later invented isolating floatation tanks, studied bottlenose dolphins, and researched on psychedelic drug-induced near-death experiences. He also explored yoga and human consciousness.
35 Mason Gamble
Leonard Adleman is a computer scientist best known as a co-creator of the RSA encryption algorithm. He was honored with the 2002 Turing Award, often called the Nobel prize of Computer science, for this work. He is also a pioneer in the field of DNA computing and one of the original discoverers of the Adleman–Pomerance–Rumely primality test.
One of the two pioneering female honorary members of the Royal Astronomical Society, Mary Somerville was a 19th-century polymath and science writer. Though she specialized in math and astronomy, she was also well-versed in botany and geology. The Connection of the Physical Sciences remains her most notable work.
Princeton alumnus Brian Kernighan had a 30-year stint at the Bell Laboratories before returning to his alma mater as a professor. The Canadian computer scientist has played a major role in the development of Unix and has also co-authored the first book on the C programming language.
41 Alicia Nash
Born in El Salvador, Alicia Nash later moved to the U.S., where she became one of the first women to join MIT as a student. The physicist met her husband, renowned mathematician John Nash at MIT. Both Alicia and John were killed in car crash while returning home from Norway.
Michael Phillip Anderson began his career with the United States Air Force, logging more than 3,000 hours of flight time before joining NASA. Selected as a mission specialist first on STS-89 Endeavour and then on STS-107 Columbia, he was killed along with the rest of the crew when the later disintegrated during its re-entry into the Earth's atmosphere.
45 Wilhelm Wien
Wilhelm Wien was a German physicist famous for deducing what became known as Wien's displacement law. He is also credited with formulating an expression for the black-body radiation He was awarded the Nobel Prize in Physics in 1911 for his work on heat radiation.
Charles Hermite was a French mathematician best remembered for his research on number theory, invariant theory, algebra, elliptic functions, orthogonal polynomials, and quadratic forms. Also an inspiring and influential teacher, Hermite taught Jules Henri Poincaré, who went on to become fa amous mathematician in his own right.