Example image of eyePlorer eyePlorer map for '20th century': Common Era Gregorian calendar Austria–Hungary British Empire German Empire Great Depression Interwar period Ottoman Empire Russian Empire World War I Allies of World War II Axis powers Empire of Japan Kingdom of Italy (1861–1946) Nazi Germany Soviet Union United Kingdom United States World War II Cold War Superpower United Nations European Union History of the Soviet Union (1985–1991) India People's Republic of China Genocide Ideology Nuclear warfare World war Quantum mechanics Theory of relativity World view Airliner Automobile Cargo ship Cruise ship Horse Luxury vehicle Space Shuttle Environment (biophysical) Fossil fuel Petroleum Pollution Moon Outer space Computer Internet Mass media Paperback