Into the Unknown
how great explorers found their way by land, sea, and air
AD 1003 Leif Eriksson reaches the coast of America
1271-1274 Marco Polo rides the Silk Road to China
1405-1407 Admiral Zheng He crosses the Indian Ocean
1492 Christopher Columbus sails to the Caribbean
1519-1522 Ferdinand Magellan's fleet circumnavigates the world
1768-1771 Captain Cook maps the Pacific Ocean
1858-1864 David Livingstone explores the Zambezi River
1895 Mary Kingsley travels alone in West Africa
1928 Umberto Nobile flies over the North Pole
1932 Auguste Piccard ascends into the stratosphere
1960 Jacques Piccard dives to the Challenger Deep
1953 Edmund Hillary & Tenzing Norgay climb Everest
1969 Neil Armstrong & Buzz Aldrin land on the moon
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