This document defines and describes various geographic landmasses and regions around the world. It begins by defining continents and listing the seven current continents by size and population. It then discusses theories of past supercontinents and how the continents have shifted positions over millions of years. The document also defines and describes regions like Oceania, the Middle East, Scandinavia, Eurasia, Afro-Eurasia, Central America, Latin America, and various areas in Asia, among others. It concludes by defining islands, archipelagos, and peninsulas.