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  1. Fatal Rocky Mountain Spotted Fever in the United States, 1999 ...

    Apr 01, 2012 · Death from Rocky Mountain spotted fever (RMSF) is preventable with prompt, appropriate treatment. Data from two independent sources were analyzed to estimate the burden of fatal RMSF and identify risk factors for fatal RMSF in the United States during 1999–2007.

  2. To browse maps, select a location or click a country on the map below. North America Central America South America Europe Asia Africa Oceania

  3. Covid-19 Changed How the World Does Science, Together - The ...

    1 day ago · Never before, scientists say, have so many of the world’s researchers focused so urgently on a single topic. Nearly all other research has ground to a halt. By Matt Apuzzo and David D ...

  4. Encyclopedia of Greater Philadelphia | Yellow Fever

    Yellow Fever broke out in epidemic proportion in 1793, 1797, 1798, and 1799. The most severe, and one of the most deadly in American history, occurred in 1793, when an estimated 5,000 inhabitants died. This map records the intensity of the fever, with darker colored lines marking the streets with highest mortality.

  5. The map as history: a multimedia atlas

    The Cold War and Confrontation between East and West 1947-1991 (9 animated maps) A bipolar world - North Atlantic Treaty - Warsaw Pact - the crisis of the Cold War: The Berlin Blockade - the Cuban missile crisis - the construction of the Berlin Wall - the Euro-missile Crisis - the Wars: the Korean War, the Vietnam War

  6. The Discovery Of The Great Rift Valley, Where Africa Is ...

    Apr 03, 2018 · Africa is slowly pushed and pulled apart along a large rift, as also recently opened fissures can testify. The Great Rift of Africa was discovered almost one hundred years ago by an intrepid ...

  7. The physical map collection is housed in the David Rumsey Map Center at the Stanford University Library. The historical map collection has over 97,000 maps and related images online. The collection includes rare 16th through 21st century maps of America, North America, South America, Europe, Asia, Africa, Pacific, Arctic, Antarctic, and the World.

  8. Typhus, series of acute infectious diseases that appear with a sudden onset of headache, chills, fever, and general pains, proceed on the third to fifth day with a rash and toxemia (toxic substances in the blood), and terminate after two or three weeks. Learn more about typhus in this article.

  9. Feb 13, 2019 · Can you name the countries of the world? Your Account Isn't Verified! In order to create a playlist on Sporcle, you need to verify the email address you used during registration.

  10. 10 Ancient Fortresses Of Historical Importance | Ancient Pages

    Jan 11, 2016 · Ancient fortresses are a symbol of royalty, battles and power. They are the witness to history spanning hundreds and thousands of years. From very early history to modern times, walls and fortresses have been a necessity for many cities. In this top list we take a look at some ancient fortresses of great historical importance.