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4 days ago · Now, a study 1 of hundreds of ancient and modern genomes has pinpointed when the two species began pairing off — and has found that the genetic intermingling lasted for only a short time, at ...
5 days ago · human evolution, the process by which human beings developed on Earth from now-extinct primates. Viewed zoologically, we humans are Homo sapiens , a culture -bearing upright-walking species that lives on the ground and very likely first evolved in Africa about 315,000 years ago.
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3 days ago · The Human Terrain Teams (HTS), launched in 2007, recruited anthropologists, sociologists, and regional experts to provide U.S. military commanders and staff with a better understanding of local populations. [216] The American Anthropological Association’s Executive Board issued a statement on October 31, 2007, noting that “information ...
14 hours ago · The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life. Each eon is subsequently divided into eras, which in turn are divided into periods, which are further divided into epochs . Eon.
3 days ago · Rocky Mountains, mountain range forming the cordilleran backbone of the great upland system that dominates the western North American continent. Generally, the ranges included in the Rockies stretch from northern Alberta and British Columbia southward to New Mexico, a distance of some 3,000 miles (4,800 km). In places the system is 300 or more ...
3 days ago · The Stone Age was the prehistoric cultural stage, or level of human development, that was characterized by the creation and use of stone tools. It began some 3.3 million years ago.
5 days ago · The Anthropocene ( / ˈænθrəpəˌsiːn, ænˈθrɒpə -/ [1] [2] [3]) is the common name for a proposed geological epoch, dating from the commencement of significant human impact on Earth up to the present day. It affects Earth's geology, landscape, limnology, ecosystems and climate.
