Seafloor spreadingSeafloor spreading or Seafloor spread is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Earlier theories by Alfred Wegener and Alexander du Toit of continental drift postulated that continents in motion "plowed" through the fixed and immovable seafloor. The idea that the seafloor itself moves and also carries the continents with it as it spreads from a central rift axis was proposed by Harold Hammond Hess from Princeton University and Robert Dietz of the U.
National GeographicNational Geographic (formerly The National Geographic Magazine, sometimes branded as NAT GEO) is an American monthly magazine published by National Geographic Partners. The magazine was founded in 1888 as a scholarly journal, nine months after the establishment of the society, but is now a popular magazine. In 1905, it began including pictures, a style for which it became well-known. Its first color photos appeared in the 1910s. During the Cold War, the magazine committed itself to present a balanced view of the physical and human geography of countries beyond the Iron Curtain.
Easter IslandEaster Island (Rapa Nui; Isla de Pascua) is an island and special territory of Chile in the southeastern Pacific Ocean, at the southeasternmost point of the Polynesian Triangle in Oceania. The island is most famous for its nearly 1,000 extant monumental statues, called moai, which were created by the early Rapa Nui people. In 1995, UNESCO named Easter Island a World Heritage Site, with much of the island protected within Rapa Nui National Park. Experts disagree on when the island's Polynesian inhabitants first reached the island.
Americas (terminology)The Americas, also known as America, are lands of the Western Hemisphere, composed of numerous entities and regions variably defined by geography, politics, and culture. The Americas are recognised in the English-speaking world to include two separate continents: North America and South America. The Americas are also considered to be a single continent named America in parts of Europe, Latin America and some other areas. North America—the continent and associated islands of the Northern Hemisphere and (chiefly) Western Hemisphere.
EurocentrismEurocentrism (also Eurocentricity or Western-centrism) is a worldview that is centered on Western civilization or a biased view that favors it over non-Western civilizations. The exact scope of Eurocentrism varies from the entire Western world to just the continent of Europe or even more narrowly, to Western Europe (especially during the Cold War). When the term is applied historically, it may be used in reference to an apologetic stance toward European colonialism and other forms of imperialism.
PaleoproterozoicThe Paleoproterozoic Era (pælioʊˌproʊtərəˈzoʊɪk-;, also spelled Palaeoproterozoic), spanning the time period from (2.5–1.6 Ga), is the first of the three sub-divisions (eras) of the Proterozoic Eon. The Paleoproterozoic is also the longest era of the Earth's geological history. It was during this era that the continents first stabilized. Paleontological evidence suggests that the Earth's rotational rate ~1.8 billion years ago equated to 20-hour days, implying a total of ~450 days per year.
Regions of EuropeEurope, the westernmost portion of Eurasia, is often divided into regions and subregions based on geographical, cultural or historical factors. Since there is no universal agreement on Europe's regional composition, the placement of individual countries may vary based on criteria being used. For instance, the Balkans is a distinct geographical region within Europe but individual countries may alternatively be grouped into South-eastern Europe, Southern Europe or less commonly, Eastern Europe.
AustralasiaAustralasia (Atareiria) is a region that comprises Australia, New Zealand and some neighbouring islands in the Pacific Ocean. The term is used in a number of different contexts, including geopolitically, physiogeographically, philologically, and ecologically, where the term covers several slightly different, but related regions. Charles de Brosses coined the term (as French Australasie) in Histoire des navigations aux terres australes (1756).
