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May 3, 2024 · Weather was influential in shaping events during the American Civil War (1861–1865). For instance, concerns about weather helped determine overall strategy as well as tactics on the battlefield. Generals looked to the skies to decide when to begin spring campaigns, cursed at flooded rivers for impeding progress, and pushed their men to endure ...
15 hours ago · Geographical treatment of North America, including maps and statistics as well as a survey of its geologic history, land, people, and economy. It occupies the northern portion of the ‘New World.’. North America, the world’s third largest continent, lies mainly between the Arctic Circle and the Tropic of Cancer.
6 days ago · Other spotted fevers in the United States include: Rickettsia parkeri rickettsiosis, caused by Rickettsia parkeri. Pacific Coast tick fever, caused by Rickettsia 364D. Rickettsialpox, caused by Rickettsia akari. These diseases share many signs and symptoms, including fever, headache, and rash, but are typically less severe than RMSF.
May 14, 2024 · Mississippi River, the longest river of North America, draining with its major tributaries an area of approximately 1.2 million square miles (3.1 million square km), or about one-eighth of the entire continent. The Mississippi River lies entirely within the United States.
May 8, 2024 · The upper Missouri River at Gates of the Mountains, western Montana, north of Helena. Missouri River, longest tributary of the Mississippi River and second longest river in North America.
- The Editors of Encyclopaedia Britannica
May 6, 2024 · Tectonic maps help illustrate Earth's restless history by highlighting the major episodes of plate tectonic motion, including mountain building and ocean formation. With this map as a guide, map users can retrace the experience of Texas in Earth's history of regional and global movement.
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May 14, 2024 · Rift Valley fever (RVF) is caused by Rift Valley fever virus, which is found in most of sub-Saharan Africa, especially eastern and southern Africa. Rift Valley fever virus is carried by mosquitoes and can spread to people and animals, including cows, buffalo, sheep, goats, and camels.
