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1125586217 01 2005

Yalta Conference was one of the most important meetings of key Allied leaders during World War II (1939-1945). These leaders were President Franklin D. Roosevelt of the United States, Prime Minister Winston Churchill of Britain, and Premier Joseph Stalin of the Soviet Union. Their countries became known as the "Big Three." The conference took place at Yalta, a famous Black Sea resort in the Crimea, from Feb. 4 to 11, 1945. Through the years, decisions made there regarding divisions in Europe have stirred bitter debates...

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1125586189 01 2005

Yangon (pop. 1,315,964; met. area pop. 2,452,881) is the capital and largest city of Myanmar. It is also the country's chief port and industrial center. Yangon, also spelled Rangoon, lies in southern Myanmar on both banks of the Yangon River. It is about 20 miles (32 kilometers) north of the Gulf of Martaban, an arm of the Indian Ocean...

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1125586118 01 2005

Yangtze River, pronounced yahng dzuh, also called Yangtze Kiang, is the world's third longest river. Only the Nile and Amazon rivers are longer. It is China's longest and most important river. To many Chinese, the Yangtze is known as the Chang Jiang, or long river...

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1125586083 01 2005

Wright, Frank Lloyd (1867-1959), was one of America's most influential and imaginative architects. During his career of almost 70 years, he created a striking variety of architectural forms. His works ranged from buildings typical of the late 1800's to ultramodern designs, such as his plan for a skyscraper 1 mile (1.6 kilometers) high...


1125585906 01 2005

Yankee Doodle is a song that has been popular in the United States since the 1700's. Music historians disagree about the song's origin, but they know that its melody and words have changed over time. In 1767, American composer Andrew Barton used "Yankee Doodle" in his opera The Disappointment. The song must have been well known by that time because Barton did not write out the music. He simply directed the performers to sing his words to the tune of "Yankee Doodle."

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1125585876 01 2005

Year is the time the earth takes to make one complete revolution around the sun. There are two different kinds of years which are used by astronomers. The solar, equinoctial, or tropical year is the time between two passages of the sun through the March equinox. In the Northern Hemisphere, this equinox is called the vernal equinox. This year is 365 days, 5 hours, 48 minutes, and 46 seconds long. This year is used for all practical and astronomical purposes. It is the basis of our common or calendar year...

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1125585849 01 2005

Yeast is a single-celled organism that bakers put into dough to make it rise. It is also used in the production of beer, wine, and other alcoholic beverages. The yeasts used commercially consist of masses of the microscopic yeast organisms. There are about 600 species of yeasts, but only a few are used commercially...

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1125585817 01 2005

Yeats, pronounced yayts, William Butler (1865-1939), an Irish poet and dramatist, won the 1923 Nobel Prize for literature. Many critics consider him the greatest poet of his time. Yeats led the Irish Literary Revival, a movement of the late 1800's and early 1900's that stimulated new appreciation of traditional Irish literature. The movement also encouraged the creation of works written in the spirit of Irish culture, as distinct from English culture...

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1125585790 01 2005

Yellow fever is a virus disease carried by certain mosquitoes. The virus damages many body tissues, but especially the liver. As a result of this damage, the liver cannot function properly and yellow bile pigments gather in the skin. These pigments make the skin look yellow and give the disease its name...

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1125585759 01 2005

Yellow jacket is a type of small wasp with black-and-yellow markings. Some people mistakenly call yellow jackets "bees," but they actually are related to hornets. Like hornets, yellow jackets make their nests of paper. They form the paper by chewing up old wood and plant fibers. The nests consist of numerous hexagonal cells inside a thick paper covering. Most yellow jackets nest underground, but sometimes nests can be found hanging in trees or bushes, or within hollows in old stumps or the walls of buildings...

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