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What caused the Paleozoic Era to end?

There are many subsections in the Paleozoic Era, breaking up the millions of years into smaller chunks. The end of the Paleozoic era is called the Permian era. This era saw numerous climate changes along with fluctuations in the carbon dioxide and oxygen levels. There are numerous hypotheses about what caused the extinction at the end of the Permian era, including the sea venting hydrogen sulfate, a huge meteor in Antarctica or even all of the possibilities combined into one.

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What countries did the Vikings invade?

Countries closest to the Vikings' homeland were the most vulnerable to raids and efforts at colonization. Britain, Ireland, France and Russia were frequent targets of Viking attacks, as well as being the Norsemen's main trading partners. Norse settlers founded dynasties in Normandy, England and Russia. Even the Mediterranean island of Sicily came under Norse rule. Norse settlers followed Eric the Red, and his son, Leif, to Greenland and North America, which they called Vinland. Norse settlements that date to the Viking Age have been excavated across Russia and the Caspian Sea basin. ..

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What are some facts about Pocahontas?

Historians believe that Matoaka, later to be known as Pocahontas, was born in 1596 in Virginia. Her father, Powhatan, was the paramount chief of Tsenacommacah, an alliance of about thirty Algonquian-speaking groups. Though Pocahontas had 26 siblings, she claimed to be her father's favorite.\nBecause of her father's status, Pocahontas has been considered in popular culture to be a princess. As a young girl, she interacted with settlers of the newly formed Jamestown Colony and befriended John Smith. In December 1607, while exploring on the Chickahominy River, Smith was captured by a hu..

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What was the Tet Offensive?

The Tet Offensive was intended to cause a debilitating and decisive blow to U.S. and South Vietnam forces in the hopes that the United States would withdraw from the war. It was also intended to stop or reduce damage caused by guerrilla attacks from South Vietnam forces.\nDuring the offensive, over 70,000 Viet Cong and North Vietnamese troops simultaneously attacked highly populated areas in South Vietnam occupied by large numbers of U.S. military forces. The assault lasted through several phases, and resulted in heavy casualties on both sides, as the Viet Cong and North Vietnamese pushed into..

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Who invented the first satellite?

The Sputnik 1 was the first artificial satellite, while the Luna 1 was the first manmade object to leave Earth and send a radio signal. The U.S. launched its first satellite in 1959, and used low-orbit satellites for weather transmissions in subsequent years. The country is credited with its first commercial satellite conversation in 1962 when Vice President Lyndon Johnson received a communication from the Telstar 1, a project developed in cooperation with multiple companies and countries.

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What are some facts about the history of Sojourner Truth?

Sojourner Truth was born into slavery around 1797. She lived the earliest part of her life in Ulster County, New York, under the eye of a Dutch master. Truth herself had a Dutch accent. During her teenage years into early adulthood she was a household servant in New Paltz, New York. It was here that she fell in love with another slave, with whom she had five children. It was not long before three of these children found themselves separated from their mother and sold into slavery.\nAfter her escape from slavery in 1827, Isabella became an active advocate for slaves and women. She worked to aid..

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Why did Martin Luther King Jr. do what he did?

Dr. King focused on American injustice as it related to the political, educational and social status of black people. Despite the adoption of the 13th Amendment to the Constitution, which banned the practice of slavery, the 14th Amendment, which extended citizenship to black people and the 15th Amendment, which gave black people the right to vote, overt and covert inequalities still existed, particularly in the southern region of the country.Between 1955 and 1968, Dr. King fought to change these injustices through peaceful demonstrations and petitions to enact change. Many such demonstrations ..

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How has the role of women changed over time?

Some increased opportunities for women, such as the surge in work opportunities during World War II, stemmed from necessity. During World War II, the U.S. needed more workers to keep the national economy alive at home and provide support to troops overseas. The need for a larger workforce gave women access to more jobs than in the past.In other instances, legal reforms and implementation of policies helped women advance in society. The introduction of Title IX helped women participate in sports, and improvements in laws surrounding domestic abuse, sexual assault and other crimes against women ..

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When did North Dakota become a state?

The arrival of the railroad to Dakota Territory resulted in a population growth during the late 1800s, influencing the decision to make this area into states. While North Dakota is generally listed as becoming a state before South Dakota, President Benjamin Harrison never recorded which bill he signed first. Since there was rivalry between the two regions over which would be admitted first, the President decided to choose a bill to sign without looking at it. Upon becoming a state, Bismarck, the capital of Dakota Territory, became North Dakota's capital.

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How did Napoleon Bonaparte spread nationalism in England?

During the Napoleonic Wars, England was forced to fight not only on the European front, but also in other parts of the world, such as Egypt, India, the West Indies, South Africa and the United States. This ongoing conflict served to strengthen the British army. Before the 23 years of warfare with Napoleon, it numbered barely 40,000 men, but at the height of the war, the British army had grown to a fighting force of more than 250,000. When Napoleon was defeated, England retained an overwhelming military presence. This enabled England to embark upon a program of imperial expansion that vastly in..

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