Dian Fossey was a zoologist best known for researching the endangered gorillas of the Rwandan mountain forest from the 1960s to the '80s, and for her mysterious murder.
1932-1985
Jean Foucault was a French physicist and inventor best known for inventing the Foucault pendulum.
1819-1868
Benjamin Franklin is best known as one of the Founding Fathers who drafted the Declaration of Independence and the Constitution of the United States.
1706-1790
British chemist Rosalind Franklin is best known for her role in the discovery of the structure of DNA ,and for her pioneering use of X-ray diffraction.
1920-1958
1679-1754
Italian scientist and scholar Galileo made pioneering observations that laid the foundation for modern physics and astronomy.
1564-1642
Francis Galton was an English explorer and anthropologist best known for his research in eugenics and human intelligence. He was the first to study the effects of human selective mating.
1822-1911
1777-1855
1929-
1932-
1932-
1882-1945
Jane Goodall created one of the most trailblazing studies of primates in modern times when she dwelled with Tanzanian chimps to observe their behavior.
1934-
1920-2005
Stephen Jay Gould was an American paleontologist and evolutionary biologist, and the best-selling writer of popular science books.
1941-2002
Temple Grandin is a noted animal expert and advocate for autistic populations who has penned the books Animals in Translation and Animals Make Us Human.
1947-
1879-1968
1934-
1852-1922
Alice Hamilton was a physician and authority on lead poisoning and industrial disease. The NIOSH present an award in her name.
1869-1970
Jack Hanna, animal expert and former director of the Columbus Zoo, makes regular appearances on TV talk shows to teach people about exotic animals.
1947-
1971-
1578-1657
Stephen Hawking is known for his work regarding black holes and for authoring several popular science books. He suffers from amyotrophic lateral sclerosis.
1942-
Tony Hayward was the CEO of BP when its rig Deepwater Horizon sank in the Gulf of Mexico, creating one of the greatest environmental disasters ever.
1957-
1797-1878
1750-1848
American biologist A.D. Hershey won the Nobel Prize for Physiology or Medicine in 1969 for his research done on viruses that infect bacteria.
1908-1997
Thomas Hobbes, an English philosopher in the 17th century, was best known for his book Leviathan (1651) and his political views on society.
1588-1679
1809-1894
Robert Hooke was an English philosopher, mathematician and architect who discovered the law of elasticity, now known as Hooke's law.
1635-1703
Bernardo Alberto Houssay was an Argentinian doctor whose research on the role of pituitary hormones regulating blood sugar won him a Nobel Prize.
1887-1971
Astronomer Edwin Hubble revolutionized the field of astrophysics. His research helped prove that the universe is expanding, and he created a classification system for galaxies that has been used for several decades.
1889-1953
1730-1799
Naturalist Terri Irwin is well-known as the widow of wildlife expert Steve Irwin. The couple co-hosted the Animal Planet show The Crocodile Hunter.
1964-
J.B.S. Haldane was a British geneticist who helped found the theories of population genetics.
1892-1964
1920-
Doctor Mae C. Jemison is the first African-American woman ever to be a U.S. astronaut. In 1992, she flew into space aboard the Endeavour.
1956-
African-American chemist Percy Julian was a pioneer in the chemical synthesis of medicinal drugs such as cortisone, steroids and birth control pills.
1899-1975
A.P.J. Abdul Kalam is an Indian scientist and politician who served his country as president from 2002 to 2007.
1931-
Heike Kamerlingh-Onnes was a Dutch scientist who won the Nobel Prize in Physics for his production of liquid helium. He also discovered superconductivity.
1853-1926
Biologist Alfred Kinsey wrote Sexual Behavior in the Human Male, which was based on research he and his colleagues conducted at the Institute for Sex Research.
1894-1956
1824-1887
1743-1817
1843-1910
1946-1995
1923-
1905-1973
Edwin Land is best known as the inventor of the Polaroid camera and film, and as the co-founder of the Polaroid Corporation.
1909-1991
Immunologist and pathologist Karl Landsteiner received the Nobel Prize for Physiology or Medicine for his discovery of the major blood types.
1868-1943
1881-1957
1929-2007
Mary Leakey was a paleoanthropologist who, along with husband Louis, made several prominent scientific discoveries. Skull fossils found by the Leakeys advanced our understanding of human evolution.
1913-1996
1926-
Wen Ho Lee is a nuclear engineer who was working at Los Alamos National Laboratory when he was accused of being a Chinese spy.
1939-
Italian Jewish chemist Primo Levi survived a year at Auschwitz against all odds. He is best known his moving memoir, If This Is a Man.
1919-1987
Rita Levi-Montalcini shared the 1986 Nobel Prize for physiology or medicine for her part in the discovery of a protein that stimulates nerve cell growth.
1909-2012
1908-1980
French physicist Gabriel Lippmann created the first color photographic plate. The creation earned him the 1908 Nobel Prize for Physics.
1845-1921
British surgeon and medical scientist Joseph Lister is regarded as the founder of antiseptic medicine, which he implemented with amputee patients.
1827-1912
1924-2005
1855-1916
1906-1987
Theodore H. Maiman was a physicist, company leader, consultant and author who created the first working laser in 1960.
1927-2007
1884-1942
Professor Peter Mansfield received the Nobel Prize for further developing magnetic resonance (MRI) technology, leading to its widespread use in hospitals.
1933-
1874-1937
Rudolph A. Marcus is a Canadian chemist known for his research in electron-transfer reactions. He established what is known as the Marcus Theory, for which he was awarded the Nobel Prize in 1992.
1923-
1951-
Scottish physicist James Clerk Maxwell originated the idea of electromagnetic radiation. His ideas formed the basis for quantum mechanics.
1831-1879
Ornithologist Ernst Mayr demonstrated that the development of separate species in higher animals depends on the geographical isolation of precursor populations.
1904-2005
1902-1992
Gregor Mendel was an Austrian monk who discovered the basic principles of heredity through experiments in his garden. Mendel's observations became the foundation of modern genetics and the study of heredity, and he is widely considered a pioneer in the field of genetics.
1822-1884
Dmitri Mendeleyev was a Russian chemist who developed the periodic classification of the elements.
1834-1907
1845-1916
1863-1939
1868-1953
1927-2002
1818-1889
Mexican-born chemist Mario Molina won a Nobel Prize in 1995 for his research on how man-made compounds affect the ozone layer.
1943-
English physicist and mathematician Sir Isaac Newton, most famous for his law of gravitation, was instrumental in the scientific revolution of the 17th century.
1643-1727
Swedish chemist Alfred Nobel invented dynamite and other explosives. He used his enormous fortune from 355 patents to institute the Nobel Prizes.
1833-1896
1503-1566
1942-
1894-1989
1905-1993
1927-
Jan Hendrik Oort was a Dutch astronomer who confirmed that the Milky Way rotates in its own plane around the center of the galaxy.
1900-1992
J. Robert Oppenheimer is often called the "father of the atomic bomb" for leading the Manhattan Project, the program that developed the first nuclear weapon during World War II.
1904-1967
1901-1958
1912-2008
English born, English bred, forgotten by the English and the world, James Parkinson identified the "shaking palsy" as a disease of the central nervous system.
1755-1824
Blaise Pascal was a French mathematician, physicist and religious philosopher, who laid the foundation for the modern theory of probabilities.
1623-1662
Scientist Louis Pasteur came up with the food preparing process known as pasteurization; he also developed a vaccination for anthrax and rabies.
1822-1895
1900-1958
1901-1994
Russian physiologist Ivan Petrovich Pavlov studied "conditioned reflex" through an experiment that made hungry dogs salivate at the sound of a dinner bell.
1849-1936
1962-
Psychologist Jean Piaget identified stages of mental development, called Schema, and established the fields of cognitive theory and developmental psychology.
1896-1980
1910-2004