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. 

Marco Polo was 17 when he set out for China...and 41 when he came back! More than 700 years ago, Marco Polo traveled from the medieval city of Venice to the fabled kingdom of the great Kublai Khan, seeing new sights and riches that no Westerner had ever before witnessed. But did Marco Polo experience the things he wrote about...or was it all made up? Young listeners are presented with the facts in this entertaining Who Was...? biography. 

Joan of Arc was born in a small French village during the worst period of the Hundred Years' War. For generations, France had been besieged by the British. At age 11, Joan began to see religious visions telling her to join forces with the King of France. By the time she was a teenager, she was leading troops into battle in the name of her country. Though she was captured and executed for her beliefs, Joan of Arc became a Catholic saint and has since captured the world's imagination. 

Dr. Martin Luther King, Jr., was only 25 when he helped organize the Montgomery bus boycott and was soon organizing black people across the country in support of the right to vote, desegregation, and other basic civil rights. Maintaining nonviolent and peaceful tactics even when his life was threatened, King was also an advocate for the poor and spoke out against racial and economic injustice until his death - from an assassin's bullet - in 1968. 

He came. He saw. He conquered. Julius Caesar was a force to be reckoned with as a savvy politician, an impressive orator, and a brave soldier. Born in Rome in 100 BC, he quickly climbed the ladder of Roman politics, making allies - and enemies - along the way. His victories in battle awarded him the support of the people, but flush from power, he named himself dictator for life. The good times, however, would not last much longer. On the Ides of March, Caesar was brutally assassinated by a group of senators determined to end his tyranny, bringing his reign to an end.