James Madison made great contributions to the United States. During his presidency, he declared war on Great Britain. Not all of his decisions met public approval, but he was well respected throughout his lifetime and one of the most influential founding fathers.
Christopher Columbus set out on August 3, 1492, to find the East by sailing west. Over the course of a few years, he convinced the king and queen of Spain to pay for his trip, promising them fame and riches in return. Columbus discovered more than he bargained forâ€”he had found a new continent.
Thomas Jefferson was a gifted writer whose words helped form the country. Although at one time he wanted to be a great speaker, he found comfort and ease in writing. Not only was he a great writer, but also an architect, inventor, surveyor, scientist, and a brilliant politician. He wanted to make life better for all people.
Harriet Tubman was a slave who dreamed of freedom from a very young age. After her escape at 29, she did everything she could to help and rescue other slaves. In her later years, she built a home to take care of elderly African Americans with no place to live and encouraged women to stand together for their rights.
Albert Einstein is probably the most influential scientist and greatest physicist of the twentieth century. He revolutionized our ideas about time and space and is best known for his theory of relativity and his equation E=mc^2, which explains the relationship between energy and mass. By age 30, he was considered by many to be one of the world's greatest scientific thinkers.
Isaac Newton is considered one of the greatest scientists who ever lived. His work changed the way humans understand astronomy, physics, math, and more. He is probably most famous for three laws about the way things move, called Newton's Law of Motion.
Thomas Edison's inventions changed the world. His most famous invention is the light bulb, but he also invented generators and the power grid. Edison holds 1,000 patentsâ€”the record for the most new inventions. He even started his own electric company.