4 days ago · Epidemic typhus is a form of typhus so named because the disease often causes epidemics following wars and natural disasters. Typhus is rare in industrialized countries, and occurs primarily in the colder, mountainous regions of central and east Africa, as well as Central and South America.
- camp fever, jail fever, hospital fever, ship fever, famine fever, putrid fever, petechial fever, epidemic louse-borne typhus, louse-borne typhus
Nov 16, 2020 · A Babylonian world map, known as the Imago Mundi, is commonly dated to the 6th century BCE. The map as reconstructed by Eckhard Unger shows Babylon on the Euphrates, surrounded by a circular landmass including Assyria, Urartu and several cities, in turn surrounded by a "bitter river" (), with eight outlying regions (nagu) arranged around it in the shape of triangles, so as to form a star.
Nov 18, 2020 · A thick dust cloud travels southward from Saudi Arabia's Rub al Khali sand sea towards the edge of the Arabian Peninsula. This natural-color satellite image shows the dense part of the cloud approaching Yemen (lower left) and translucent swirls of dust over the Arabian Sea.Lines of small clouds cling to the margins of the dust plumes south of Oman (lower right).
Nov 08, 2020 · A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of the earth. While this is true of any map, these distortions reach extremes in a world map.
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Oct 30, 2020 · Himalayas, Nepali Himalaya, great mountain system of Asia forming a barrier between the Plateau of Tibet to the north and the alluvial plains of the Indian subcontinent to the south. The Himalayas include the highest mountains in the world, with more than 110 peaks rising to elevations of 24,000 feet (7,300 metres) or more above sea level.
Nov 18, 2020 · Yellow fever and urban development. A yellow fever epidemic in Chattanooga caused an exodus in 1878. Almost 12,000 people fled the city, many going to Lookout Mountain. At the time, the mountain was accessible on the north side only by a four-hour trip up the old Whiteside Turnpike, which was built in the 1850s and cost a toll of two dollars.
Oct 29, 2020 · Andes Mountains, South American mountain system that contains the highest peaks in the Western Hemisphere. One of the Earth’s great natural features, the Andes form an unbroken rampart over some 5,500 miles—from the southern tip of South America to the continent’s northernmost coast on the Caribbean.
Nov 04, 2020 · Ganges River, great river of the plains of the northern Indian subcontinent, which from time immemorial has been the holy river of Hinduism. Despite its importance, its length of 1,560 miles (2,510 km) is relatively short compared with the other great rivers of Asia or the world.
Oct 29, 2020 · Appalachian Mountains, North American highland system that extends for almost 2,000 miles from the Canadian province of Newfoundland and Labrador to central Alabama in the United States, forming a natural barrier between the eastern Coastal Plain and the vast Interior Lowlands of North America.