An "explorer" is a person who travels to new or unfamiliar places to discover and learn about them. Explorers often seek out uncharted territories, study different cultures, and gather information about the natural environment. Their journeys can lead to significant discoveries that contribute to our understanding of the world. Throughout history, many famous explorers, such as Christopher Columbus and Marco Polo, have made notable contributions to geography and science. They often faced challenges like harsh weather, difficult terrain, and unknown dangers, but their adventures have inspired generations to seek knowledge and adventure in the world around them.