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Hawaii.....us Moving away......

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The floor of the Pacific Ocean is divided into several plates. The largest one, the Pacific Plate is moving north west relative to the plate that holds North America, and relative to hot spots coming up through the mantle from below the plates (they generate islands like Hawaii). On the surface of the earth, nothing can move along a straight line, instead the plates rotate around a point on the surface. The pacific plate rotates around a point south of Australia. Around Hawaii, the plate is moving at about 7 cm/year, or about as fast as finger mails grow. The evidence for this motion is pretty convincing: Earthquakes: earthquakes occur on the boundaries of the plates as they rub past each other. The motion observed during these earthquakes agrees well with the expected motion. Absolute measurements: Thanks to the Global Positioning System navigation system, we can now measure the location of any point on the earth to within a few cm. The observed motions agree with exp...
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The Hagia Sophia.....

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The Hagia Sophia , whose name means “holy wisdom,” is a domed monument originally built as a cathedral in Constantinople (now Istanbul, Turkey ) in the sixth century A.D. It contains two floors centered on a giant nave that has a great dome ceiling, along with smaller domes, towering above. “Hagia Sophia’s dimensions are formidable for any structure not built of steel,” writes Helen Gardner and Fred Kleiner in their book "Gardner’s Art Through the Ages: A Global History." “In plan it is about 270 feet [82 meters] long and 240 feet [73 meters] wide. The dome is 108 feet [33 meters] in diameter and its crown rises some 180 feet [55 meters] above the pavement.” In its 1,400 year life-span it has served as a cathedral, mosque and now a museum. When it was first constructed, Constantinople was the capital of the Byzantine Empire. This state, officially Christian, originally formed the eastern half of the Roman Empire and carried on after the fall of Rome. F...
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Death Ray

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In the early 1930s, Great Britain found itself in a rather precarious position. Military theorists were predicting, quite correctly, that the next war would be dominated by air power, and the ominous threat of aerial bombardment. With Nazi Germany on the rise, the Brits suddenly felt very vulnerable. To address the problem, Britain launched a number of projects in hopes of mitigating the threat — including an effort to develop nothing less than a high-tech "death ray" that could shoot enemy planes out of the sky. But even though the project failed to develop such a weapon, it did result in something potentially far more useful — a technological breakthrough that would prove to play an integral role in the British victory over the Nazis during the Battle of Britain. 1930 کی دہائی کے اوائل میں ، برطانیہ نے خود کو ایک غیر یقینی صورتحال میں پایا۔  فوجی نظریے پیش گوئ کر رہے تھے ، بالکل درست ، کہ اگلی جنگ فضائی طاقت ، اور فضائی بمباری کے بدنما خطرے کے زیر اثر ہوگی۔  نازی جرمنی میں ...
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