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The Great American Biotic Interchange (commonly abbreviated as GABI), also known as the Great American Interchange and the Great American Faunal Interchange, was an important late Cenozoic paleozoogeographic biotic interchange event in which land and freshwater fauna migrated from North America to South America via Central America and vice ...
George Washington. George Washington (February 22, 1732 – December 14, 1799) was a Founding Father of the United States, military officer, and farmer who served as the first president of the United States from 1789 to 1797. Appointed by the Second Continental Congress as commander of the Continental Army in 1775, Washington led Patriot forces ...
The first known mass extinction was the Great Oxidation Event 2.4 billion years ago, which killed most of the planet's obligate anaerobes. Researchers have identified five other major extinction events in Earth's history, with estimated losses below: [11] End Ordovician: 440 million years ago, 86% of all species lost, including graptolites
This is an accepted version of this page This is the latest accepted revision, reviewed on 14 November 2024. "American history" redirects here. For the history of the continents, see History of the Americas. Further information: Economic history of the United States Current territories of the United States after the Trust Territory of the Pacific Islands was given independence in 1994 This ...
The history of biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine and the works of Aristotle, Theophrastus and Galen in the ancient Greco-Roman world.
The American Revolution was a rebellion and political movement in the Thirteen Colonies which peaked when colonists initiated an ultimately successful war for independence against the Kingdom of Great Britain. Leaders of the American Revolution were colonial separatist leaders who originally sought more autonomy as British subjects, but later ...
Tecumseh's confederacy. Tecumseh's confederacy was a confederation of Native Americans in the Great Lakes region of North America which formed during the early 19th century around the teaching of Shawnee leader Tenskwatawa. [2] The confederation grew over several years and came to include several thousand Native American warriors.
The Frontier Thesis, also known as Turner's Thesis or American frontierism, is the argument by historian Frederick Jackson Turner in 1893 that the settlement and colonization of the rugged American frontier was decisive in forming the culture of American democracy and distinguishing it from European nations. He stressed the process of "winning ...