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Sacajawea Sacajawea, also spelled Sacagawea (1788-1812) was a Shoshone Indian who guided, and acted as interpreter and negotiator for Meriwether Lewis and William Clark on their exploratory expedition. She traveled with them from North Dakota to the Oregon coast and back. For more information on Sacajawea, click here. |
Sagan, Carl Carl Sagan (1934-1996) was an American astronomer who discovered that the surface of Venus was extraordinarily hot and noxious (contrary to previous models of a mild Venusian surface). Sagan also showed that the universe has many organic (carbon-based) chemicals and that life is likely to exist throughout the cosmos. He was a great popularizer of astronomy, was also involved in many NASA flights and SETI, and he pioneered the field of exobiology. |
Sandage, Allan R. Allan Rex Sandage (1926-) is an astronomer who, in the 1950's, measured the rate of the expansion of the Universe, Hubble's constant (H), which he calculated to be 50 km/sec/mpc. From this, Sandage estimated of the age of the Universe (T) to be 19.2 billion years [T = 2/3 x (1/H) ]. These calculations have changed through the years and now, H=~ 75 (T=12.9 billion years) is more generally accepted. Sandage also discovered quasars in 1964. |
Scott, Dred Dred Scott (1795-1858) was a a slave who sued for his freedom in court, since he had been taken to a "free" state (Wisconsin). He lost his case in St. Louis, Missouri, but won it on appeal. His case was again appealed and Scott lost. The results of his court case led to major political upheavals in the USA and eventually, the Civil War. |
Sereno, Paul C. Paul C. Sereno (1958 - ) is a US paleontologist from the University of Chicago who has worked in South America, Asia and Africa. He discovered the first complete skull of Herrerasaurus, excavated a giant Carcharodontosaurus (1996), found and named Afrovenator (with others, 1994), named the oldest-known dinosaur, Eoraptor (with others, 1993), Suchomimus, found the second oldest fossils bird, Sinornis ("Chinese bird"), in 1991, Jobaria, and Nigersaurus. Sereno named: Deltadromeus (1996) and Marasuchus (with Arcucci, 1994). He has rearranged the dinosaur family tree, reorganizing the ornithischians and naming the clade Cerapoda (1986), formed from the ornithopods and marginocephalians. |
Shapley, Harlow Harlow Shapley (1885-1972) was an American astronomer who was the first person to accurately estimate the size of the Milky Way Galaxy and our position in it. |
Shepard, Alan Alan B. Shepard Jr. (1923-1998) piloted America's first manned space mission. This astronaut briefly flew into space on May 5, 1961, in Freedom 7, a Mercury space capsule. The capsule splashed down at sea and was retrieved by helicopter. Shepard also piloted Apollo XIV to the moon, accompanied by Edgar D. Mitchell and Stuart A. Roosa. They took off on January 31, 1971. Shepard and Mitchell landed on the moon in the lunar module (landing near the Fra Mauro Crater) on February 5, 1971, while Roosa orbited the moon in the command module. Shepard hit golf balls on the moon during this historic trip. Click here for a coloring page on Shepard. |
Sitting Bull Sitting Bull, Tatanka-Iyotanka (1831-1890) was a great Sioux (Hunkpapa Lakota) Indian chief and the last chief to surrender to the U.S. government. |
Smith, Jedediah Jedediah Smith (1798-1831) was an American mountain man, hunter, trapper, and explorer. Smith was from New York and was the first European American to reach California overland from the east (though the Rocky Mountains and the Mojave Desert). He was also the first European American to cross the Great Basin Desert via the Sierra Nevada Mountains and the Great Salt Lake (on his return from California). During this trip, the heat was so unbearable that Smith and his men resorted to burying themselves in the sand during the hottest parts of the day. Smith was killed by Comanche Indians on the Santa Fe Trail near the Cimarron River in 1831. His body was never found. Smith never published an account of his travels, so little is known about them. |
Sternberg, Charles H. A fossil hunter who found many dinosaurs for E.D. Cope, mostly in Alberta, Canada from 1912-1917. He worked with his sons Charles M., George, and Levi. |
Sternberg, Charles M. Charles M. Sternberg (son of Charles H. Sternberg, who collected fossils for E. D. Cope, working mostly in Alberta, Canada from 1912-1917) was a US fossil hunter who named the following dinosaurs: Brachylophosaurus (1953), Edmontonia (1928), Macrophalangia (1932), Montanoceratops (1951), the Pachycephalosaurid family (1945), Pachyrhinosaurus (1950), Parksosaurus (1937), and Stenonychosaurus (1932). |
Stuyvesant, Peter Peter Stuyvesant (1592-1672) was a Dutch colonial governor of New Amsterdam (now called New York City). Stuyvesant was born in Holland and began working for the Dutch West India Company in 1632. In 1643, Stuyvesant was appointed the director of Curaçao, Aruba, and Bonaire (islands in the Caribbean). Fighting against the Portuguese in the Caribbean, Stuyvesant lost his right leg when it was crushed by a cannonball, and thereafter walked on a silver-tipped wooden leg. In 1645, Stuyvesant became the director general of the extensive Dutch lands in North America, including islands in the Caribbean. He went to New Amsterdam (New York City, New York) as governor in 1647, succeeding Willem Kieft. Stuyvesant ruled the chaotic colony in a harsh, despotic manner that was often resented by the colonists. After the colonists demanded self-governance, Stuyvesant appointed a 9-man advisory board based on a model of Dutch government (this was the first municipal government in New Amsterdam), but Stuyvesant was still in charge. In a boundary dispute, Stuyvesant gave up a large tract of land between New Netherland and Connecticut in 1650. He also conquered New Sweden, driving Swedish colonists from their land along the Delaware River. Stuyvesant lost New Amsterdam to the British in 1664, when the colonists decided to surrender to the British without a fight (against Stuyvesant's wishes). New Amsterdam was renamed New York, and the British Captain Richard Nicholls became governor. Stuyvesant later retired to his 62-acre farm on Manhattan, called the Great Bouwerie. (Bouwerie is the old Dutch word for farm, from which the modern-day Bowery gets its name.) Stuyvesant died in August, 1672. |
Sundbach, Gideon The zipper was improved by the Swedish-American engineer, Gideon Sundbach, in 1913. Sundbach was also successful at selling his "Hookless 2." Sundbach sold these fasteners to the US Army, who put zippers on soldiers' clothing and gear during World War I. The word zipper was coined by B.F. Goodrich in 1923, whose company sold rubber galoshes equipped with zippers. Goodrich is said to have named them zippers because he liked the zipping sound they made when opened and closed. |
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