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A printing press is a device for evenly printing ink onto a print medium such as paper or cloth. The device applies pressure to a print medium that rests on an inked surface made of moveable type, thereby transferring the ink.German inventor Johannes Gutenberg invented a printing press.
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Christopher Columbus set of on hopes to find "Asia" voyaging on three ships, the Nina, Pinta and Santa Maria. After landing in the Bahamas, Christopher Columbus finished his journey and discovered America in 1492.
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A microscope is an instrument used to see objects that are too small for the naked eye. Dutch lens grinder Zacharius Jannssen invents the mircoscope.
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The smallpox vaccine was the first successful vaccine to be developed. Edward Jenner developed the vacination in 1796. Prior to widespread vaccination, mortality rates in individuals with smallpox were high—up to 35% in some cases.
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The United States purchased more than 2 million square kilometers of land from France, in 1803.
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Lincoln was assassinated at a theater in Washington DC, by John Wilkes Booth.
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William T.G. Morton demonstrated a substance powerful enough to dull the pain and agony that had long been associated with surgery.
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Thomas Alva Edison invented the first lightbulb
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Clara Barton founded the American Red Cross in 1881. The American Red Cross, also known as the American National Red Cross, is a volunteer-led, humanitarian organization that provides emergency assistance, disaster relief and education inside the United States.
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X-rays were discovered by William Roentgen in 1895. The use of X-rays for medical purposes was started by John Hall-Edwards in Birmingham, England. Then in 1908, he had to have his left arm amputated because of the spread of X-ray dermatitis on his arm.
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Asprin was created from the juice in willow tree bark.
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Marie Curie isolated radium in 1910.
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Sir Alexander Fleming dicovered Penicillin in 1928.
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Women and healers have practiced the induction of labor for centuries. Inducing the labor may have been tried, and / or achieved, by using herbs, tonics, remedies or exercises. It was not until the 1940's that medical drugs were developed to start labor.
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Jonas Salk developed the polio vaccine in 1952. The vaccine have eliminated polio from most countries in the world and reduced the worldwide incidence from an estimated 350,000 cases in 1988 to 1,652 cases in 2007.
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John Fitzgerald Kennedy, the 35th President of the United States, was assassinated at 12:30 p.m.on Friday, November 22, 1963, in Dealey Plaza, Dallas, Texas.
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Louise Brown created the first test tube baby on July 25th, 1978 in England.
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Plane attacks on the Twin Towers in New York and the Pentagon. The attacks on September 11th, changed the views of most Americans on airport security, muslims and the war on terror.
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