Boundaries between the continents of Earth Boundaries between the continents of Earth The boundaries between the continents of Earth are generally a matter of geographical convention. Several slightly different conventions are in use. The number of continents is most commonly considered seven but may range as low as four when the Americas and Afro-Eurasia are each considered a single continent. According to the definition of a continent in the strict sense, an island cannot be part of any continent, but by convention and in practice most major islands are associated with a continent. There are three overland boundaries subject to definition: While the isthmus between Asia
Middle-earth the earth as Middle-earth twice, both in Chapter 13, "They Have Pulled Down Deep Heaven on Their Heads". Lewis's borrowings came directly from Tolkien himself: they were close friends and shared each other's literary creations. Lewis encouraged Tolkien to persevere with his Middle-earth writings. A small selection from the many books about Tolkien and his created world: Middle-earth Middle-earth is the fictional setting of much of British writer J. R. R. Tolkien's legendarium. The term is equivalent to the term "Midgard" of Norse mythology, describing the human-inhabited world, that is, the central continent of the Earth in Tolkien's imagined mythological