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What were some types of transportation in the 1800s?

Before the widespread use of the steam engine, travel by water had to take advantage of wind, currents or manpower for propulsion. Much of the river travel in this period was one-way, as a keelboat or raft could transport goods downstream easily, but upstream travel was arduous. When goods needed to travel against the current of a river, they typically traveled over land. Steamboats allowed vessels to travel against the current, creating the first two-way river-transportation systems.\nRailroads proved to be an important transportation innovation in the 1800s, due to their ability to transport..

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Who invented the diode?

All of these early diodes were vacuum tube diodes. The vacuum tube diode was the most common form until the 1950s, when semiconductor diodes supplanted them. Semiconductor diodes were invented shortly after vacuum tube diodes, but were not stable enough for practical use until the mid-20th century. Karl Ferdinand Braun invented the first semiconductor diode in 1874 and patented it in 1899.

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What are fun facts about the California Miwok Indians?

The Miwok governed themselves in tribelets, small groups of about 100 to 500 individuals. Each tribelet had a headman who directed gathering and hunting efforts and settled disagreements. The position of headman within each tribelet was passed down from father to son. Speakers and messengers worked closely with the headman to disperse information among the tribelet.\n\nMiwok homes in the foothills and on the plains were constructed of pole frames covered in grass or reeds. In the mountains, homes were made of bark slabs that leaned against each other, forming a conical shape. Each community ha..

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Who is Manuela Escobar?

In 2012, José Alejandro Castaño published "Cierra los ojos, princesa" (Spanish for "Close Your Eyes, Princess), a novel about Manuela Escobar, based on his time with the family and numerous interviews with others who had known them.\nEscobar's widow and children fled Colombia in 1995 after failing to find a country that would grant asylum. The UK's Independent reported in 1999 that lawyers for Manuela (then 12 years old) won her the legal right to inherit all the real estate her father willed to her. The property was estimated to be worth two billion dollars. At the same time, MarÃ..

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When was the first black and white television invented?

In 1927, 21-year-old Philo Farnsworth presented his version of the television. The first image projected on his version was a line created when an electron beam scanned pictures. About 15 years before Farnsworth presented his creation, Russian Boris Rosing had conducted similar experiments transmitting moving pictures. Early in the 1920s, both English and American inventors presented mechanical television systems. All their televisions transmitted in black and white. RCA eventually chose Zworykin to help them develop the black and white televisions sets it sold in 1939.

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Who was Montesquieu?

Montesquieu began his career when he first published the "Persian Letters" in 1722. This was regarded as a brilliant piece of satire, and Montesquieu became famous when people discovered he was the author. This fame led him to gain many powerful supporters, aiding in his desire to continue his education through foreign travel. During this period of time, he often considered writing a major work on law and politics. Finally, in 1740, he began work on "The Spirit of Law", one of the greatest books written about political history in jurisprudence. The book was published in 1750.

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What were some successes of the American Federation of Labor?

The AFL's professed belief in the growth of the capitalist system as a benefit to both employers and workers enabled the organization to be viewed as a rational alternative to other labor organizations that advocated a more radical approach. During World War I, the AFL entered into an informal relationship with the United States government to support the war-production effort and to weaken the influence of radical labor groups such as the Socialist Party of America and the Industrial Workers of the World. In return, the federal government helped to persuade certain large industries to rec..

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Are any Korean War veterans still living?

Many of these veterans face continuing health problems from the extreme cold they encountered in Korea. The U.S. Department of Veteran Affairs estimates that 5,000 soldiers died in Korea from the extreme cold conditions. They also state that continued health problems for living veterans include skin cancer in frostbite areas, arthritis, fallen arches, stiff toes, cold sensitization and a higher risk for amputation.\nThe Korean War lasted from 1950 to 1953. There were 5.7 million men and women active in the military during the Korean War; 54,246 died during the Korean War, and 103,284 were woun..

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What enabled the Romans to construct their arches and domes?

A notable example of a Roman dome supported only by the structure's side walls is the Pantheon, which contains a support-free and uninterrupted open interior space under its rotunda. This open interior space measures more than 140 feet in diameter and height. The Pantheon's concrete dome was constructed by pouring wet concrete into the movable wooden molds, or coffers. When the wet concrete hardened, the wooden molds were removed, and the interior of the dome took on the appearance of having been constructed from recessed rectangular panels.

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Who made Mount Rushmore?

The project lasted from 1927 to 1941. The head of Washington was the first to be dedicated on July 4, 1930. In 1941, Borglum died and left his son Lincoln to complete Mount Rushmore. The site draws over 2 million viewers each year, making it one of the most popular tourist attractions in the United States. Mount Rushmore is also known as "The Shrine to Democracy."

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