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Where is Antarctica?

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The Antarctica is a continent that surrounds the South Pole. It is a vast cold region with harsh climatic conditions. Very few animals can live in the freezing conditions there . These animals have large amounts of fat or fur to protect them. Some of these animals are penguin, seal, cormorant, skua , etc. Nearly all the land in the Antarctica is covered by ice cap except for few mountain ranges. This ice cap is about 2,500 metres thick and at some places it is up to 4,700 metres thick.
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Where was the Pizza Invented?

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It was Naples in Italy, where pizza began as a dish for poor people. At first, they were made of bread with cheese, basil , salt and pepper. Tomatoes were added only after the discovery of America . Pizzas were made long before that. But because pizza is known throughout the world as a dish with tomatoes, it is more correct to look upon it as an Italian-American invention . 
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How is Air-traffic Control Organized?

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A ir-traffic controllers make sure that planes take off and land safely and fly without any delays. The pilots are told where to fly so that no air collision takes place. The radar provides the air-traffic control staff with updated information about the exact position, destination and identity of every plane and about the weather conditions. When a plane is about 2,700 metres away from an airport and 600 metres above it, it enters the terminal control area. Working from this centre, the controller guides the pilot telling him at which height to fly or wait and circle the airport, when the plane has to land, etc. The controllers are also responsible for aircraft taking off and they also control planes throughout their flight from one airport to the next.
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Who was Karl Marx?

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K arl Marx (1818-1883) was a political thinker and writer whose ideas brought about great social and political changes . He was born in Germany. His ideas were the starting point of communism. He believed that people who own property, the capitalist class, keep the workers down, so that the owners can become richer. He also thought that the workers would one day rise against the capitalists and take control. His ideas later inspired communist revolutions all over the world, notably the Russian Revolution .
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Why are Olympic Games Held Every Four Years?

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T he first known Olympic games were held at Olympia in Greece in 776 B.C . They grew out of a religious ceremony held there that involved a sprinting race, They were held after every four years after a legend that the race of the religious ceremony should be done after four years. The Greek games ended in 394 A.D . 1500 years later, the modern Olympics were revived in 1896 and it was decided to stage them after every four years, exactly as it was done during ancient Greek times. Olympics have become the most magnificent sports festival of the world. Each time they are held in a different country where athletes from different nations compete in races , jumping, gymnastics, football, yatching and many more contests.
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