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For which country did Amerigo Vespucci work?

Vespucci claimed in a letter that he made a voyage that discovered Venezuela under the Spanish flag in 1497; this letter, however, is highly controversial, and many people believe that the events it recounts are inauthentic. However, he did make a trip to the New World in 1499, sailing for the Spanish crown. On this trip, his ships explored the coast of South America, perhaps as far down as Brazil. He made at least two later trips in 1501 and 1504 for King Manuel I of Portugal, discovering Rio de Janiero, Rio de la Plata and a number of other important South American locales.

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What are some American Indian tribes native to Arizona?

Native Americans have been living in what is now the state of Arizona for thousands of years. Some of the tribes in Arizona are specific to the area, whereas others such as the Navajos lived in Arizona as well as in Utah and New Mexico. The Navajo Nation is the largest Native American reservation in the United States, and the majority of its members live in Arizona.\nAs of 2015, the state is home to 22 federally recognized Native American tribes, nations and communities. Most of the native tribes of Arizona continue to live as they did for centuries, and their reservations allow visitors to le..

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When was the synthesizer invented?

The synthesizer is one of the earliest known electronic music devices. It works by creating sounds through a microchip that are then amplified via headphones or speakers. The synthesizer can create sounds that mimic other instruments such as the piano, the flute or the guitar as well as create new unique sounds. The first synthesizers available commercially were not created by Gray, but by Robert Moog in 1964.

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Who were some notable U.S. Presidents?

George Washington, the first president, served from 1789 until 1797. He was unanimously elected twice. His decisions and choices as commander-in-chief set the standard for many modern-day traditions. He gave the first State of the Union address in 1790.\nThe 16th president, Abraham Lincoln, served from 1861 until his assassination in 1865. After election, he was thrust into the crisis of the Civil War. During the war, he felt it necessary and just to emancipate the slaves in the South, and he made repeated trips to visit troops and keep morale high. Following the war, his plans for the Souther..

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Why was the conversion of Clovis I important?

After the collapse of the Roman Empire in Western Europe, Clovis I conquered what was left of its western holdings by defeating the last Roman commander of the region in 486 at the Battle of Soissons. Clovis' conversion to Roman Catholicism 10 years later effectively made him an ally of Rome rather than a threat. His conversion also lent support to the Church of Rome in its struggle against Arianism, which is an alternate and non-trinitarian form of Christianity.According to the history of the Frankish kings written by Gregory of Tours, a 6th-century historian, Clovis' decision to co..

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What did Martin Luther King Jr do?

Martin Luther King Jr. was involved with many of the most well-known activities of the civil rights movement. In 1955, Martin Luther King Jr. was selected by the NAACP to head a city-wide boycott against the Montgomery bus system after Rosa Parks was arrested for refusing to give up her bus seat to a white man. After 1955, King was involved with a variety of protests and worked to eradicate injustice against African-Americans. He promoted non-violent demonstrations to raise awareness of African-American rights and organized peaceful marches as well as sit-ins. In 1963, Martin Luther King Jr. d..

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How was duct tape invented?

Stoudt was working in a factory that manufactured these hard-to-open ammunition packs. She was initially ignored, but after writing to President Roosevelt and explaining both the problem and her proposed solution, her idea was put into action. Duct tape was originally called Duck tape, and though that is a registered trademark name now, it is said that the origins of the name are related to the fact that the tape was waterproof, like a duck, and was made using cotton duck fabric.

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What symbols did the Vikings use?

The word "rune" comes from an old Norse word meaning "engraving." Because the tools used were primitive, the runes consist of straight lines. Each rune has a name and a letter corresponding to it. For example, the rune "ehwaz" corresponds to the letter E and looks like the Latin letter M.\nThe connection of runes to Norse mythology comes through Odin, the chief god of the Aesir. According to the myths, Odin hung upside-down on the world-tree that Yggdrasil pierced by a spear for nine days with no food or water. He looked down into the Well of Urd, saw the runes and took them. In the process Od..

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What did Gottlieb Daimler invent?

Gottlieb Daimler was an experienced engineer who first began inventing engines while working at the firm of Nikolaus Otto, the inventor of the first four-stroke internal-combustion engine. The two inventors started their own engineering firm in 1882 and quickly patented the first high-speed internal-combustion engine. Unlike previous inventions, Otto and Daimler's engine featured several valves that made the engine more efficient. This engine served as the basis for all future engine inventions.\nAfter applying this type of engine to various forms of transportation, the men built an autom..

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How did James Watt contribute to the Industrial Revolution?

Working steam engines existed before Watt's improvements, but they were bulky and expensive and produced relatively little power. Watt's first improvement was to separate the chamber that created steam from the rest of the engine, so that the engine would no longer overheat and could produce power more consistently and efficiently. Watt patented his condensing chamber in 1769 and continued to make improvements to the steam engine over the subsequent years, including use of a steam "jacket" to prevent steam from condensing in the engine's cylinder and closing the upper part of th..

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