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Eurasia
Eurasia is the combined continental landmass of Europe and Asia.〔
"While a few professionals may regard Europe as a mere peninsula of Asia (or Eurasia), most geographers—and almost all nongeographers—continue to treat it not only as a full-fledged continent, but as the ''archetypal'' continent."〕 The term is a portmanteau of its two constituents. Located primarily in the Northern and Eastern Hemispheres, it is bordered by the Atlantic Ocean on the west, the Pacific Ocean to the east, the Arctic Ocean on the north, and by Africa, the Mediterranean Sea, the Pacific Ocean and the Indian Ocean to the south.〔(【引用サイトリンク】url=http://geography.about.com/od/learnabouttheearth/a/What-Is-Eurasia.htm )〕 The division between Europe and Asia as two different continents is a historical and cultural construct, with no clear physical separation between them; thus, in some parts of the world, Eurasia is recognized as the largest of five or six continents.〔
Eurasia covers around , or around 36.2% of the Earth's total land area. The landmass contains around 5.0 billion people, equating to approximately 70% of the human population. Humans first settled in Eurasia between 60,000 and 125,000 years ago. Some countries, notably the United Kingdom, Japan, Indonesia and others are included under the popular definition of Eurasia, in spite of being separate from the massive landmass.
==Overview==
Physiographically, Eurasia is a single continent.〔 The concepts of Europe and Asia as distinct continents date back to antiquity and their borders are geologically arbitrary, with the Ural and Caucasus ranges being the main delimiters between the two. Eurasia is connected to Africa at the Suez Canal, and Eurasia is sometimes combined with Africa as the supercontinent Afro-Eurasia. Due to the vast landmass and differences in latitude, Eurasia exhibits all types of climate under the Köppen classification – including the harshest types of hot and cold temperatures, high and low precipitation and various types of nature.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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