Allow readers to join the most intrepid explorers of all time on their voyages into the unknown. Students will learn what inspired these explorers and how their discoveries changed the world. They'll read about an Egyptian queen who led an expedition up the River Nile 3,500 years ago and discover why the Vikings sailed to North America 500 years before Columbus. This is an accessible reference book that captures all the excitement and spirit of adventure characteristic of the great explorers themselves.