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  1. United States Map - World Atlas

    www.worldatlas.com/maps/united-states.html

    The map above shows the location of the United States within North America, with Mexico to the south and Canada to the north. Found in the Western Hemisphere, the country is bordered by the Atlantic Ocean in the east and the Pacific Ocean in the west, as well as the Gulf of Mexico to the south.

  2. Michigan, constituent state of the U.S. It is split into two large land segments: the sparsely populated Upper Peninsula and the mitten-shaped Lower Peninsula. The Upper Peninsula shares a southwestern border with Wisconsin, while the Lower Peninsula is bordered to the south by Indiana and Ohio.

  3. Centennial Mountains | Bureau of Land Management

    www.blm.gov/visit/centennial-mountains

    Centennial Mountains - This 28,000-acre mountain range, which forms the boundary between southwest Montana and Idaho, is some of southwest Montana’s wildest country. It is considered an important corridor for wildlife movement, providing an east-west trending mountain range connecting the Yellowstone Ecosystem with the rest of the northern ...

  4. Africa | People, Geography, & Facts | Britannica

    www.britannica.com/place/Africa

    Aug 14, 2020 · Africa, the second largest continent, covering about one-fifth of the total land surface of Earth. Africa’s total land area is approximately 11,724,000 square miles (30,365,000 square km), and the continent measures about 5,000 miles (8,000 km) from north to south and about 4,600 miles (7,400 km) from east to west.

  5. Rocky Mountain Spotted Fever in the United States, 2000–2007 ...

    www.ncbi.nlm.nih.gov/pmc/articles/PMC2912596

    Jan 01, 2000 · Introduction. Rocky Mountain spotted fever (RMSF) is a tick-borne disease caused by the intracellular bacterium Rickettsia rickettsii. 1, 2 Rocky Mountain spotted fever has long been considered one of the most severe tick-borne rickettsial infections, with pre-antibiotic case-fatality rates reported as high as 65–80% in some case series 1 – 4;contemporary estimates from 1981 to 1998 placed ...

  6. List of U.S. National Historic Landmarks by state - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._National...

    The United States National Historic Landmark Program is designed to recognize and honor the nation's cultural and historical heritage. The program was formally inaugurated with a series of listings on October 9, 1960; as of February 16, 2017, there are 2,596 designated landmarks.

  7. Forest Health: Mountain Pine Beetle - Rocky Mountain National ...

    www.nps.gov/romo/learn/nature/mtn_pine_beetle...

    May 29, 2018 · Bark beetles range from Canada to Mexico and can be found at elevations from sea level to 11,000 feet. The effects of bark beetles are especially evident in recent years on Colorado's western slope, including Rocky Mountain National Park (RMNP) with a severe epidemic of mountain pine beetle occurring in Grand County.

  8. Major American Epidemics of Yellow Fever (1793-1905 ...

    www.pbs.org/wgbh/americanexperience/features/...

    Yellow fever epidemics took more than 41,000 lives in New Orleans from 1817-1905, but the 1905 outbreak was America's last. Today, yellow fever continues to appear in small outbreaks in South ...

  9. The Library of Congress has custody of the largest and most comprehensive cartographic collection in the world with collections numbering over 5.5 million maps, 80,000 atlases, 6,000 reference works, over 500 globes and globe gores, 3,000 raised relief models, and a large number of cartographic materials in other formats, including over 19,000 cds/dvds.

  10. Early American Roads and Trails

    freepages.rootsweb.com/~gentutor/genealogy/trails.html

    Contact your regional historical societies, library reference and/or local history department, or area genealogical societies. Resources (including maps and county histories etc.) are most likely to be located at such locations. 3. Download and study a 2-page PDF file about any of the 18 roads or trails introduced at this web site.