Yogurt, also spelled yoghurt, is a smooth, semisolid dairy product made from milk. It has a high acid content and thick curd. Yogurt ranks as a popular food in many parts of the world. People in Iran, Turkey, and some other countries of the Middle East have eaten yogurt for thousands of years. Yogurt consumption in the United States increased considerably in the late 1900's...

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Yokohama, pronounced yoh kuh HAH muh (pop. 3,220,331), is a Japanese port and a major center of commerce and industry. Among the cities of Japan, only Tokyo has more people. Yokohama lies about 20 miles (32 kilometers) south of Tokyo, on the island of Honshu. Yokohama is the capital of Kanagawa Prefecture. A prefecture is a political unit in Japan...

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Yosemite National Park, pronounced yoh SEHM ih tee, is a great wilderness in east-central California. It is located in the Sierra Nevada mountains, about 200 miles (320 kilometers) east of San Francisco. It has about 700 miles (1,100 kilometers) of trails. Most of the trails lead to the "High Sierra," a region of sparkling lakes, rushing streams, and jagged mountain peaks. The park's Yosemite Museum has a collection of Indian displays and exhibits of the area's wildlife...

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Yorkshire is a large geographical area in northeastern England. It covers the county of North Yorkshire, the East Riding of Yorkshire, the nine metropolitan areas that make up the southern and southwestern parts of Yorkshire, and the ancient cathedral city of York. North Yorkshire is almost entirely rural. The southern and southwestern parts of Yorkshire are mainly industrial and urban. These parts are made up of the two former metropolitan counties of South Yorkshire and West Yorkshire...

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Young, Brigham (1801-1877), led the Mormons from Illinois to what is now Utah, and established their church there. Young was the second president of the Mormon church, which is officially called the Church of Jesus Christ of Latter-day Saints. He became the Mormon leader in 1844, after Joseph Smith, the church founder, was shot to death. Young was a tireless worker. A strong will, engaging personality, and deep convictions made him an outstanding leader...

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Young, John Watts (1930-...), is a United States astronaut. He has made more space flights than any other astronaut. On March 23, 1965, Young and Virgil I. Grissom made the first flight in the Gemini program. They circled the earth three times and became the first space pilots to change their orbit...

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Yugoslavia is what remains of a much larger country, also called Yugoslavia, that broke up into several independent nations in 1991 and 1992. The new Yugoslavia, like the former, lies on the Balkan Peninsula in southeastern Europe. Belgrade is the nation's capital and largest city...

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Yukon River is one of the longest rivers in North America. It rises in far northwestern British Columbia, Canada. It flows across Canada's Yukon Territory and Alaska in the United States. About two-thirds of the river's course is in Alaska, and about one-third is in Canada. The river's total length is 1,979 miles (3,185 kilometers). The Yukon drains more than 330,000 square miles (855,000 square kilometers). About half of this area lies in Alaska...

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Yukon Territory, pronounced YOO kahn, is a region in northwest Canada. It is part of a vast subarctic region, with long, cold winters and short, cool summers. The Yukon Territory is sparsely populated due to its harsh climate and rugged terrain. The territory has rich mineral deposits and magnificent scenery. Many prospectors hurried to the territory during the Klondike Gold Rush in 1897 and 1898. Today, mining remains the most important industry. Tourism and government are also important...

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Zinc, a chemical element, is a shiny, bluish-white metal. It is important in industry. Zinc can be worked into almost any shape using conventional metalworking methods. Such metals as iron and steel can be galvanized--that is, coated with zinc--to prevent rusting. Galvanized metal is used in such products as roof gutters and tank linings. Zinc is also used in electric batteries. Plants and animals require zinc for normal growth and healing. Zinc is also a component of the hormone insulin...

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