1882-1935
In 1897, Virginia O'Hanlon wrote a letter to a newspaper about the existence of Santa Claus and got the famous response, "Yes, Virginia, there is a Santa Claus."
1889-1971
1905-1993
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
1824-1891
1922-2007
1864-1944
1909-1993
Blaise Pascal was a French mathematician, physicist and religious philosopher, who laid the foundation for the modern theory of probabilities.
1623-1662
1901-1988
1304-1374
1463-1494
American poet and critic Robert Pinksy is best known for writing about the significance of every-day experiences.
1940-
American author Robert Pirsig is best known for his philosophical novel Zen and the Art of Motorcycle Maintenance: An Inquiry into Values (1974).
1928-
Sylvia Plath was a gifted, troubled poet, known for the confessional style of her work. She wrote the novel The Bell Jar.
1932-1963
Ancient Greek philosopher Plato founded the Academy and is the author of philosophical works of unparalleled influence in Western thought.
424-347
1688-1744
Janie Porter Barrett was a social worker and reformer who established a school for previously incarcerated African-American girls.
1865-1948
1733-1804
Howard Pyle was an American illustrator, author and teacher who produced dozens of classic illustrated volumes, including fables, fairy tales and adventure stories.
1853-1911
British social anthropologist A.R. Radcliffe-Brown had a profound impact on British and American social anthropology through his version of Functionalism.
1881-1955
Santiago Ramón y Cajal was a Spanish histologist and professor whose work led to the discovery of neurons.
1852-1934
Louis Renault was a French jurist and educator and co-winner in 1907 of the Nobel Prize for Peace.
1843-1918
Hiram Revels is best known as the first African American to serve in the United States Senate.
1827-1901
Adrienne Rich is a U.S. poet, scholar and critic whose work exhibits her commitment to the women's movement and a lesbian/feminist aesthetic influence.
1929-2012
1913-2005
In 1983, astronaut and astrophysicist Sally Ride became the first American woman in space aboard the space shuttle Challenger. Ride died on July 23, 2012 at the age of 61, following a battle with pancreatic cancer.
1951-2012
Faith Ringgold is an American artist and author who became famous for innovative, quilted narrations like Tar Beach that communicate her political beliefs.
1930-
Max Roach was a jazz drummer and pioneer of the bebop style.
1924-2007
1944-
1779-1869
American novelist and short-story writer Philip Roth is best known for his provocative explorations of Jewish and American identity.
1933-
Jean-Jacques Rousseau is best known as an influential 18th-century philosopher who wrote the acclaimed work A Discourse on the Arts and Sciences.
1712-1778
1903-1997
1872-1970
1871-1953
1933-
1935-2003
American economist Paul Samuelson is best known as a founder of neo-Keynesian economics and for being the first American to win the Nobel Prize in Economics.
1915-2009
Sonia Sanchez formed the Broadside Quartet. She was an activist for racial equality, pioneered black studies and has written poetry, plays and kids’ books.
1934-
Jean-Paul Sartre was a 20th century intellectual, writer and activist who put forth pioneering ideas on existentialism.
1905-1980
Augusta Savage is remembered as an artist, activist, and arts educator, serving as an inspiration to the many that she taught, helped, and encouraged.
1892-1962
1893-1957
1921-
1917-2007
Controversial radio host Laura Schlessinger, also known as "Dr. Laura," is an expert at giving listeners—and readers—a piece of her mind when it comes to moral living and leading a successful family life.
1947-
Arthur Schopenhauer was a German philosopher best known for his book The World as Will and Representation, and for his pessimistic views of human nature.
1788-1860
Austrian theoretical physicist Erwin Schrödinger contributed to the wave theory of matter and to other fundamentals of quantum mechanics.
1887-1961
Franz Schubert is considered the last of the classical composers and one of the first romantic ones. Schubert's music is notable for its melody and harmony.
1797-1828
1875-1965
John Scopes is best known as the Tennessee teacher found guilty of breaking the law for teaching evolution in his class room.
1900-1970
Alice Sebold is an American writer and best-selling author of the book, The Lovely Bones, which has been hailed the most successful debut novel since Gone with the Wind.
1963-
1928-2004
1906-2001
Betty Shabazz is best known as the wife of African-American nationalist leader Malcolm X, who was assassinated in New York City in 1965.
1934-1997
1931-
Peter Singer is an Australian philosopher whose work in applied ethics has led to controversial views on abortion, animal liberation and infanticide.
1946-
J.C.L. Simonde de Sismondi was an 18th-19th century economist and author who espoused pioneering ideas on governmental structures.
1773-1842
American psychologist B.F. Skinner is best known for developing the theory of behaviorism, and for his utopian novel Walden Two (1948).
1904-1990
1967-
Scottish social philosopher and political economist Adam Smith wrote The Wealth of Nations and achieved the first comprehensive system of political economy.
1723-1790
Socrates was a Greek philosopher and the main source of Western thought. Little is known of his life except what was recorded by his students, including Plato.
470-399
1918-2008
Susan Sontag was a critical essayist, cultural analyst, novelist and filmmaker. She wrote On Photography, Illness as Metaphor, The Volcano Lover and In America.
1933-2004
Charlotta Spears Bass was a journalist and activist who, as editor of the California Eagle, championed African-American equality and freedom.
1874-1969
Roger W. Sperry was a 20th century scientist who won the Nobel Prize for his groundbreaking research on brain hemispheres.
1913-1994
Rudolf Steiner was a lecturer and founder of anthroposophy. His works attempted to find a synthesis between science and mysticism.
1861-1925
1805-1852
Theater director Lee Strasberg co-founded the Group Theatre, where he directed experimental plays, and later became artistic director of the Actors Studio.
1901-1982
1899-1973
Margaret Suckley was a close friend and confidante of Franklin Delano Roosevelt and served as the archivist for the first American presidential library.
1891-1991
Anne Sullivan was a teacher who, at age 21, taught Helen Keller, who was deaf, mute, and blind, how to communicate and read Braille.
1866-1936
1954-
William Howard Taft, the 27th president of the United States, fulfilled a lifelong dream when he was appointed chief justice of the Supreme Court, becoming the only person to have served as both a U.S. chief justice and president.
1857-1930
1915-2005
1906-1990
Mary Church Terrell was a charter member of the NAACP and an early advocate for civil rights and the suffrage movement.
1863-1954
1909-1974
J.J. Thomson was a Nobel Prize winning physicist whose research led to the discovery of electrons.
1856-1940
American essayist, poet, and practical philosopher, Henry David Thoreau was a New England Transcendentalist and author of the book Walden.
1817-1862
Educational psychologist E.L. Thorndike pioneered the fields of animal learning and behavioral psychology with his theory of connectionism.
1874-1949
J.R.R. Tolkien is an internationally renowned fantasy writer. He is best known for authoring The Hobbit and the Lord of the Rings trilogy.
1892-1973
Barbara Tuchman, American historian and two-time Pulitzer Prize winner, is best known for writing The Guns of August and Stilwell and the American Experience in China, 1911-45.
1912-1989
Famed mathematician Alan Turing proved in his 1936 paper, "On Computable Numbers," that a universal algorithmic method of determining truth in math cannot exist.
1912-1954
Alexander Lucius Twilight is thought to be the first African American to graduate from an American university (Middlebury College, 1823).
1795-1857
Peter Ustinov was an English actor, writer and director who is known for his Oscar-winning performances in Spartacus (1960) and Topkapi (1964).
1921-2004
Mona Jane Van Duyn was a National Book Award and Pulitzer Prize-winning poet and academic.
1921-2004
1834-1923
Rudolf Virchow was a German pathologist and statesman, widely credited for his advancements in public health, particularly with his cell theory.
1821-1902
Antonio Vivaldi was a 17th and 18th century composer who’s become one of the most renowned figures in European classical music.
1678-1741
Author Voltaire wrote the satirical novella Candide and, despite controversy during his lifetime, is widely considered one of France's greatest Enlightenment writers.
1694-1778
1775-1854
1834-1910
Elizabeth Warren is a Democrat from Massachusetts who was elected to the U.S. Senate in 2012. She previously worked as an assistant to President Barack Obama and helped design the Consumer Financial Protection Bureau, among several other roles.
1949-
Educator Booker T. Washington was one of the foremost African-American leaders of the late 19th and early 20th centuries, founding the Tuskegee Normal and Industrial Institute, now known as Tuskegee University.
1856-1915
James D. Watson is a Nobel Prize-winning biophysicist and researcher credited with co-discovering the double-helix structure of DNA.
1928-
1903-1966
Noted economist Robert Weaver, was the first African American to serve in the U.S. cabinet as the U.S. Secretary of Housing and Urban Development.
1907-1997