Explorers are people who seek out the unknown, sailing and traveling to find new things. Some of these explorers tried to find better, more efficient, trade routes. Others were searching for new worlds. Some of the most exciting, daring, and famous explorers took great risks to find these things. Amelia Earhart tried to see if humans could fly around the world before she vanished. Sir Walter Raleigh helped to colonize North America. In this book, readers will find out about these great explorers and more!.