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
The Continent Makers story set on Earth in terms of chronology. P. Schuyler Miller, in a review of the collection, observed that the reader "may feel cheated to find that the title story, worth about one quarter of the book, takes place back on Earth," though finding its "various aliens" and "grand climax" worthy of comment. The Continent Makers The Continent Makers is a science fiction novella by American writers L. Sprague de Camp, part of his "Viagens Interplanetarias" series. It was first published in the magazine "Thrilling Wonder Stories" in the issue for April, 1951. It first appeared in book form in