3
Space Exploration
3
Leif Erikson
3
Ibn Battuta
3
John Smith
3
Ferdinand Magellan
3
Daniel Boone
3
James Cook
3
Space and Astronomy
3
Vasco da Gama
3
Amerigo Vespucci
3
Famous Explorers
3
Edmund Hillary
3
Christopher Columbus
3
Jacques Cartier
3
Neil Armstrong
3
Samuel de Champlain
3
Jacques Cousteau
3
Sacagawea
3
Juan Ponce de León
3
Francis Drake
3
Roald Amundsen
3
David Livingstone
3
John Cabot
3
Zheng He