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Tropical storms Nadine and Michael could hit the American continent in the next few weeks according NASA forecasts.The new Tropical Depression 14 has specifically been sighted at a region 1,200 miles East of Lesser Antilles and is moving at a reasonably dangerous speed of 55 km per hour.

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Tropical Storm Isaac slowly weakening but still causing heavy rain and flooding in several states in the southern United States.

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One person has already been reported dead with more feared marooned by the floods.

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Hurricane Isaac struck New Orleans exactly seven years after the Katrina disaster.

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President Barack Obama declared a state of emergency in Louisiana ahead of the arrival of Tropical Storm Isaac.

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Today, forecast models have pushed Isaac’s track further west, bringing Pensacola, Mobile, Gulfport/Biloxi, and even New Orleans into its crosshair.

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Spacecrafts and how they work.

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There are many scientists who merit that title. Undoubtedly, Isaac Newton is a character that contribute much to the development of scientific knowledge.

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A biography for the famous scientist: Isaac Newton.

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Yet for all the allegiance of thought and boldness of his quest, the riddle of Isaac Newton still remains to this day. He is still as much of an enigma to the world as he was to himself.