Clarissa "Clara" Barton was a shy girl who grew up to become a teacher, nurse, and humanitarian. At a time when few women worked outside the home, she became the first woman to hold a government job, as a patent clerk in Washington, DC. In 1864, she was appointed "lady in charge" of the hospitals at the front lines of the Union Army, where she became known as the "Angel of the Battlefield." Clara Barton built a career helping others. She went on to found the American Red Cross, one of her greatest accomplishments, and one of the most recognized organizations in the world.

Cassius Marcellus Clay, Jr. won the world heavyweight championship at the age of 22, the same year he joined the Nation of Islam and changed his name to Muhammad Ali. He would go on to become the first and only three-time (in succession) World Heavyweight Champion. Nicknamed "The Greatest," Ali was as well known for his unique boxing style, consisting of the Ali Shuffle and the rope-a-dope, as he was for the catchphrase "float like a butterfly, sting like a bee." He was an uncompromising athlete who brought beauty and grace to a very rough sport and became one of the world's most famous...

Born into slavery in Maryland in 1818, Frederick Douglass was determined to gain freedom--and once he realized that knowledge was power, he secretly learned to read and write to give himself an advantage. After escaping to the North in 1838, as a free man he gave powerful speeches about his experience as a slave. He was so impressive that he became a friend of President Abraham Lincoln, as well as one of the most famous abolitionists of the nineteenth century.

Isaac Newton was always a loner, preferring to spend his time contemplating the mysteries of the universe. When the plague broke out in London in 1665 he was forced to return home from college. It was during this period of so much death, that Newton gave life to some of the most important theories in modern science, including gravity and the laws of motion.

Born on a small farm in rural Michigan, Henry Ford's humble beginnings were no match for his ambition. Ford quickly created a manufacturing dynasty, bringing affordable cars to the masses and forever changing America and the American workplace. Who Was Henry Ford? details his meteoric rise, and explains how the genius behind the assembly line and the Model T shaped modern American industry.

Though she grew up in rural Pennsylvania, Rachel Carson dreamed of the sea. In 1936 she began work with the Bureau of Fisheries and soon after published Under the Sea Wind, her first of many nature books. Her 1962 bestseller, Silent Spring, sent shockwaves through the country and warned of the dangers of DDT and other pesticides. A pioneering environmentalist, Rachel Carson helped awaken the global consciousness for conservation and preservation.

Growing up the youngest of seven children in Puerto Rico, Roberto Clemente had a talent for baseball. His incredible skill soon got him drafted into the big leagues where he spent 18 seasons playing right field for the Pittsburgh Pirates. Who Was Roberto Clemente? tells the story of this remarkable athlete: a twelve-time All-Star, World Series MVP, and the first Latin American inducted into the Baseball Hall of Fame.

Susan B. Anthony may be an international icon but her campaign for women's rights had personal roots. Working as a school teacher in New York, Anthony refused to settle for less pay than her male colleagues which ignited her lifelong devotion to women's equality. Anthony toured the United States and Europe giving speeches and publishing articles as one of the most important advocates of women's rights. Learn more about the woman behind the movement in Who Was Susan B. Anthony?

No one knew the boy they called Jumping Badger would grow to become a great leader. Born on the banks of the Yellowstone River, Sitting Bull, as he was later called, was tribal chief and holy man of the Lakota Sioux tribe in a time of fierce conflict with the United States. As the government seized Native American lands, Sitting Bull relied on his military cunning and strong spirituality to drive forces out of his territory and ensure a future homeland for his people."

Mohandas Karamchand Gandhi was born in 1869 in British-occupied India. Though he studied law in London and spent his early adulthood in South Africa, he remained devoted to his homeland and spent the later part of his life working to make India an independent nation. Calling for non-violent civil disobedience, Gandhi led India to independence and inspired movements for civil rights around the world. Gandhi is recognized internationally as a symbol of hope, peace, and freedom.