21st Century Scientists

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.

Public Welfare Medal-winning astrophysicist and academic Neil deGrasse Tyson hosted shows such as NOVA ScienceNow, Cosmos: A Spacetime Odyssey, and Star Talk. He is the director of Hayden Planetarium and contributed to the dismissal of Pluto’s status as the ninth planet. He has also written a monthly column as "Merlin.”

Widely recognized as one of the two important pioneers of the personal computer revolution, Steve Wozniak is credited with co-founding Apple Inc. along with Steve Jobs. Not surprisingly, he has been described as one of the men that changed the course of history through technology. Apart from being a programmer and technology entrepreneur, Steve Wozniak is also a well-known philanthropist.

Richard Dawkins is a British ethologist, author, and evolutionary biologist. He first achieved popularity after publishing his book, The Selfish Gene, which is credited with popularizing the gene selection theory. The book is also credited with introducing the term meme. In 2006, he established the Richard Dawkins Foundation for Reason and Science to promote secularism and scientific literacy.

E. O. Wilson is an American naturalist, biologist, and writer. An influential biologist, Wilson has earned several nicknames, such as The Darwin of the 21st century. He has also been referred to as the father of biodiversity and the father of sociobiology. In 1995, he was ranked among the most influential American personalities by Time magazine.

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.

Widely known as ten inventor of the world wide web, Tim Berners-Lee made the first communication between an HTTP client and server through the internet in 1989. He is associated with various organizations, such as the W3C and the World Wide Web Foundation, and has received the knighthood, too.

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.

Alexander Grothendieck was a 20th-century mathematician who was a leading figure in the creation of modern algebraic geometry. With his so-called "relative" perspective, he revolutionized many areas of pure mathematics. During his later career, he became a professor at the University of Montpellier. He is counted among the greatest mathematicians of the 20th century.

Jane Goodall is an English anthropologist and primatologist. Goodall's research proved that chimpanzees could use tools like stalks of grass to fish out termites from termite holes; this also challenged the long-held belief that chimpanzees were vegetarians. Goodall also discovered that chimpanzees are capable of emotions like sorrow and joy. Goodall is also credited with founding the Jane Goodall Institute.

Widely regarded as a national treasure in the United Kingdom, Sir David Attenborough is the only person to have received BAFTAs for TV shows meant for different television sets, such as black and white, color, 3D, HD, and 4K. In 2002, he was mentioned in BBC's 100 Greatest Britons list.

Terence Tao is an Australian-American mathematician who works at the University of California, Los Angeles as a professor of mathematics. Widely considered one of the most prominent living mathematicians, Tao was honored with the prestigious Fields Medal in 2006. In 2014, he was awarded the Breakthrough Prize in Mathematics.

Jawed Karim is an American Internet entrepreneur and software engineer. Karim is credited with co-founding one of the most popular online video-sharing platforms, YouTube. He is also credited with uploading the first YouTube video named Me at the zoo. During his time working at PayPal, Jawed Karim had designed many of the company's core components, such as its anti-Internet-fraud system.

Peter Higgs is a British theoretical physicist. He studied at King's College London and was awarded a Ph.D. in 1954. He went on to have a brilliant academic career and was elected Fellow of the Royal Society (FRS) in 1983. In 2013, he shared the Nobel Prize in Physics with Belgian physicist François Englert.  

Nigerian-American physician, forensic-pathologist and neuropathologist Bennet Omalu is most-noted for discovering chronic traumatic encephalopathy (CTE) in American football players. He was serving at Allegheny County coroner's office in Pittsburgh at that time. He presently serves as President and Medical Director of Bennet Omalu Pathology, chief medical examiner for San Joaquin County, and as professor at the University of California, Davis.

American–Australian naturalist Terri Irwin is best known as the co-host of The Crocodile Hunter, along with her husband, the late animal expert Steve Irwin. She has also been part of shows such as Croc Files and Crikey! It's the Irwins, and helped in the development of Australia Zoo.

Brian Cox is an English physicist and former musician. He has presented numerous science programs for BBC radio and TV, especially the Wonders of... series. He is also the author of several popular science books. He has been lauded for his efforts to publicize science and was awarded the British Association's Lord Kelvin Award in 2006. 

One of the "Four Horsemen of Atheism," neuroscientist and author Sam Harris is known for his works on topics such as religion, artificial intelligence, and terrorism. His books include the New York Times bestseller The End of Faith. He hosted the podcast Making Sense and released a meditation app, too.

American mathematician and aerospace engineer Mary Jackson went down in history as the first African-American woman to work as a NASA engineer. Initially a math teacher, she later joined NACA under Dorothy Vaughan and contributed to countless American space programs at a time when racial segregation was the norm.

American astronomer Vera Rubin is best known for her pioneering discoveries on galaxy rotation rates, her groundbreaking work confirming the existence of dark matter and for her life-long advocacy for women in science. She studied the galactic rotation curves and provided strong evidence of the existence of dark matter. The Vera C. Rubin Observatory in Chile is named after her.

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.

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.

Temple Grandin is an American activist and scientist. An outspoken proponent of the neurodiversity and autism rights movements, Grandin is one of the first individuals to document the insights gained from her own experience of autism. She has also authored over 60 scientific papers on animal behavior. Her life and work inspired the 2010 biographical drama film Temple Grandin.

While he grew up to be a Harvard math professor, that didn’t stop Tom Lehrer from pursuing his childhood love for music. He gained fame as a satirical composer, with songs such as So Long, Mom, I’m Off to Drop the Bomb and That Was The Year That Was.

Maryam Mirzakhani was an Iranian mathematician best remembered for her innovative methods and research involving different branches of mathematics like symplectic geometry and ergodic theory. On 13 August 2014, she became the first Iranian and only woman to date to be honored with the prestigious Fields Medal. Maryam Mirzakhani died of breast cancer when she was 40 years old.

Roger Penrose’s contribution to the research related to the black hole and general relativity earned him the Nobel Prize in Physics in 2020. The Emeritus Rouse Ball Professor of Mathematics at Oxford, Roger is also a fellow of Wadham College, St John's College of Cambridge, and University College London.

James Watson is a geneticist, molecular biologist, and zoologist. He is credited with co-authoring the academic paper that propounded the double helix structure of nucleic acids such as DNA for which he was awarded the Nobel Prize in 1962. In 1977, he was honored with the Presidential Medal of Freedom. In 1997, he was awarded the National Medal of Science.

Norman Borlaug was an American agronomist who played a key role in the Green Revolution, a set of research technology transfer initiatives that increased agricultural production, for which he won the Nobel Peace Prize in 1970. Nicknamed the Father of the Green Revolution, Borlaug was also honored with the Congressional Gold Medal and Presidential Medal of Freedom for his work.

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.

English mathematician Sir Andrew John Wiles, a Royal Society Research Professor at the University of Oxford, is best known for proving the modularity theorem for semistable elliptic curves, thereby proving Fermat's Last Theorem for which he was awarded the Abel Prize and the Copley Medal by the Royal Society. He also proved the main conjecture of Iwasawa theory.

Jeremy Wade is a British TV presenter, biologist, and freshwater detective. He is best known for his TV series River Monsters, Mighty Rivers, and Dark Waters. He attended the University of Kent and began his career as a biology teacher. He made his TV debut by chance and didn’t take long to become a popular TV presenter. 

American biochemist Jennifer Doudna of the University of California, Berkeley, who has made fundamental contributions in biochemistry and genetics, is best-known for her pioneering work in CRISPR gene-editing. Doudna and Emmanuelle Charpentier received the 2020 Nobel Prize in Chemistry for developing a method for genome editing through CRISPR, marking them as the only two women to share science Nobel ever.

Credited with coining the term software engineering, computer scientist and systems engineer, Margaret Heafield Hamilton served as the Director of the Software Engineering Division of the MIT Instrumentation Laboratory, overseeing the development of the on-board flight software for NASA's Apollo program.  A prolific writer, she is also the founder of two software companies; Higher Order Software and Hamilton Technologies.

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.