3
John Smith
3
Jacques Cousteau
3
Leif Erikson
3
Christopher Columbus
3
Francis Drake
3
David Livingstone
3
Vasco da Gama
3
Sacagawea
3
Ibn Battuta
3
Zheng He
3
Neil Armstrong
3
James Cook
3
Jacques Cartier
3
Daniel Boone
3
Samuel de Champlain
3
Marco Polo
3
Ferdinand Magellan
3
Roald Amundsen
3
John Cabot
3
Amerigo Vespucci
3
Edmund Hillary