Planet earth: Earth in space ; Origins of the universe ; Galaxies ; Planet earth ; Moon ; Space exploration ; Earth as a biophysical system ; Evolution of earth ; Movement of plates ; Rocks ; Landforms ; Climate ; Water cycle ; Oceanography ; Plants and animals ; Earth's biosphere ; Soils ; Earth as a home for humans ; Land resources ; Ocean resources ; Commerce ; Population and health ; Natural hazards -- People and society: Human evolution ; Human migrations ; Languages and writing ; Emerging civilizations ; From city-states to empires ; Religions of the world ; Traders and travelers ; Explorers and settlers ; Industrial world ; International organizations ; Globalization -- A-Z country listings -- Maps: Oceania ; Asia and the Middle East ; Europe and the Russian Federation ; Africa ; North and Central America ; South America ; Poles ; Oceans ; Gazetteer

1. Geography -- Encyclopedias