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This hemisphere contains approximately 68% of Earth's landmass and is home to about 90% of the global population. [4] It includes North America, Europe, Asia, and most of Africa. Southern Hemisphere: The half that lies south of the Equator. It contains approximately 32% of Earth's landmass and is home to about 10% of the global population.
Its surface is 60.7% water, compared with 80.9% water in the case of the Southern Hemisphere, and it contains 67.3% of Earth's land. [3] The continents of North America and mainland Eurasia are located entirely in the Northern Hemisphere, together with about two-thirds of Africa and a small part of South America.
The term "United States," when used in the geographic sense, refers to the contiguous United States (sometimes referred to as the Lower 48, including the District of Columbia not as a state), Alaska, Hawaii, the five insular territories of Puerto Rico, Northern Mariana Islands, U.S. Virgin Islands, Guam, American Samoa, and minor outlying possessions. [1]
Knowledge of the location of Earth has been shaped by 400 years of telescopic observations, and has expanded radically since the start of the 20th century. Initially, Earth was believed to be the center of the Universe, which consisted only of those planets visible with the naked eye and an outlying sphere of fixed stars. [1]
1990s CIA political map of the Americas in Lambert azimuthal equal-area projection. The Americas, sometimes collectively called America, [3] [4] [5] are a landmass comprising the totality of North America and South America.
North American map; North America Political map; Oldest Human Remains in North America Found; T. H. Clark and C. W. Stearn, The Geological Evolution of North America (1968) W. P. Cumming et al., The Discovery of North America (1972) R. C. West et al., Middle America: Its Lands and Peoples (3d ed. 1989)
This article may be confusing or unclear to readers.In particular, much of the current article is anachronic. This subject needs a more historical perspective ; the notion of Western Hemisphere is tightly linked to the widespread use of double-hemisphere world maps in the 17th to 19th centuries and in this sense very similar in meaning to the New World.
Shift of the world's economic center of gravity since 1980 and projected until 2050 [7] Various definitions of geographical centres exists. The definitions used by the references in this article refer to calculations within the 2 dimensions of a surface, mainly as the surface of Earth is the domain of human cultural existence.