From the migrations of Homo erectus to the exploration of space, man has continually reached beyond his natural boundaries to discover unknown lands. Follow the footsteps of Alexander the Great's epic military expedition through central Asia and India; voyage to the south of the American continent and learn how Magellan discovered the strait that bears his name; travel to the United States, where Lewis and Clark explored the Great Plains and Rocky Mountains; and journey to the Antarctic to witness the bittersweet race between Scott and Amundsen to reach the South Pole. In addition, hand-drawn maps and expedition journals chronicle the gradual discovery of the world through the eyes and voices of the individuals who turned their backs on conventional society to embrace the unknown.