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Radisson, Pierre Esprit
Pierre Esprit Radisson (1636-1710) was a French explorer and fur trader who settled in Canada in 1651. He and his brother-in-law, Médard Chouart de Groseillier, were the first European explorers to see what is now Minnesota. Radisson was instrumental in forming the Hudson's Bay Company (an English fur trading monopoly which was founded in 1670). Radisson also trekked to Hudson Bay (in 1668 and 1670). Radisson wrote about his treks through the North American wilderness and his capture by the Iroquois (1651-1653).
Raleigh, Walter
Sir Walter Raleigh (1554-1618) was a British explorer, poet, historian, and soldier. Raleigh led expeditions to both North America and South America; he was trying to found new settlements, find gold, and increase trade with the New World. In 1585, Raleigh sent colonists to the east coast of North America; Raleigh later named that area Virginia, in honour of Elizabeth, the Virgin Queen. He is often credited with bringing tobacco and potatoes from the New World to Britain, but they were already known there. Raleigh was later executed by King James I for treason.
Reagan, Ronald Wilson
Ronald Reagan was the 40th president of the United States of America (from 1981-1989); his Vice-President was George H. W. Bush. During Reagan's two terms as US President, the American hostages in Iran were freed, communism in the Soviet Union was defeated peacefully (this was symbolized by the eventual fall of the Berlin Wall separating communist East Berlin and democratic West Berlin), and US taxes were lowered
Reno, Jesse W.
Jesse W. Reno was an American inventor who developed the first escalator in 1891. An escalator is a moving stairway that helps people move easily from floor to floor in building. On his "inclined elevator," passengers rode on an wedge-shaped supports attached to a conveyor belt at an incline of about 25 degrees. The original elevator had a stationary handrail (which was soon replaced with a moving handrail).
Revere, Paul
Paul Revere was a silversmith who warned American partiots that the British were coming as the American Revolution began.
Ride, Sally
Sally Kristen Ride (May 26, 1951-2012) was the first American woman in space. Dr. Ride's first trip into space was aboard NASA's space shuttle Challenger (STS-7) in 1983 (June 18-June 24). Her second (and last) space flight was the eight-day Challenger (STS 41-G) mission (in October, 1984).

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For a cloze activity on Ride, click here

Rillieux, Norbert
Norbert Rillieux (March 17, 1806-October 8, 1894) was an African-American inventor and engineer who invented a device that revolutionized sugar processing. Rillieux's multiple effect vacuum sugar evaporator (patented in 1864) made the processing of sugar more efficient, faster, and much safer. The resulting sugar was also superior. His apparatus was eventually adopted by sugar processing plants all around the world.

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Ritty, James
The mechanical cash register was invented (and patented) in 1879 by James Ritty (1836-1918). Ritty was an American tavern keeper in Dayton, Ohio. He nicknamed his cash register the "Incorruptible Cashier," and started the National Manufacturing Company to sell them. When a transaction was completed, a bell rang on the cash register and the amount was noted on a large dial on the front of the machine. During each sale, a paper tape was punched with holes so that the merchant could keep track of sales (at the end of the day, the merchant could add up the holes).

John H. Patterson (1844-1922) bought Ritty's patent and his cash register company in 1884. Patterson renamed the Dayton, Ohio, company the National Cash Register Company. Patterson improved Ritty's cash register by adding a paper tape that kept a printed record of all transactions.

In 1906, Charles F. Kettering (and employee of NCR) developed an electric cash register (Kettering later worked for General Motors and invented the electric car ignition).

The National Cash Register Company was later called NCR, until the company was bought by ATT in 1991; it was given back the name NCR in 1996, when it was split off from ATT.


Robinson, Jackie
Jack (Jackie) Roosevelt Robinson (January 31, 1912 - October 24, 1972) was the first black man allowed to play major league baseball.

On April 11, 1947, Robinson played his first major league baseball game (he played for the New York Dodgers in an exhibition game against the New York Yankees). Robinson played with the Dodgers for 10 years. He played in six World Series and was the first African-American in the Baseball Hall of Fame (in 1962).

For more information and activities on Robinson, click here.

radioRoper, Sylvester Howard
Sylvester Howard Roper (1823-1896) was an American inventor from New Hampshire and Massachusetts. Roper developed a coal-powered, two-cylinder, steam-driven wooden motorcycle in 1867. Roper also developed a steam-driven car. Roper died at the age of 73 while testing a new motorcycle.
Russell, Dale A.
Dr. Dale Alan Russell is a vertebrate paleontologist and author. He is a Research Professor at North Carolina State University and Senior Curator of Paleontology at the North Carolina Museum of Natural Sciences. Russel has named the following dinosaurs: Alxasaurus (Russell and Dong, 1994), Archaeornithomimus (1972), Atlasaurus (Monbaron, Russell and Taquet, 1999), Cristatusaurus (Taquet and Russell, 1998), Daspletosaurus (1970), Dromiceiomimus (1972), Dyslocosaurus (McIntosh, Coombs and Russell, 1992), Lurdusaurus (Taquet and Russell, 1999), Sigilmassasaurus (Russell, 1996), and Sinornithoides (Russell and Dong, 1994). Russell has written many papers and books, including, "Odyssey in Time: The Dinosaurs of North America" 1989 and "Systematics and Morphology of American Mosasaurs" (1967). In 1971, Russell and the physicist Wallace Tucker published a paper (in the journal Nature) called "Supernovae and the extinction of the dinosaurs," which theorized that a supernova caused the K-T Extinction. This was the first theory to put the blame on an extra-terrestrial phenomenon.
Russell, Henry N.
Henry Norris Russell (1873-1967) was an American astronomer who, independently of E. Hertzsprung, realized the relationship between a star's temperature (color) and its brightness, and designed a diagram illustrating this relationship in 1913, later called the Hertzsprung-Russell Diagram.

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