3

Ibn Battuta

3

Zheng He

3

Neil Armstrong

3

Vasco da Gama

3

Isthmuses of the World

3

Edmund Hillary

3

Jacques Cartier

3

Amerigo Vespucci

3

John Cabot

4

Table Mountain, South Africa

3

Magnetism

3

Leif Erikson

3

Ferdinand Magellan

3

David Livingstone

3

Marco Polo

3

James Cook

3

Samuel de Champlain

4

Maddy's Iowa Diary

3

Sacagawea

3

John Smith

3

Astronauts

3

Juan Ponce de León

3

Jacques Cousteau

3

Francis Drake

4

Maddy's Maryland Diary

3

Christopher Columbus

3

Daniel Boone

3

Roald Amundsen