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No, I don't think that anti-gravity is possible. The interpretation of gravity found in Einstein's General Theory of Relativity is a... -
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Sometime during the sixteenth century, British farmers moved from sleeping on the ground to sleeping in beds. These beds were little more th... -
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Maximilien Robespierre was an important leader during the French Revolution. He was part of the Commune of Paris that overthrew Louis XVI. U... -
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A drag force is a force that opposes an object's motion through a fluid. Like sliding friction, drag always pushes the object in the dir... -
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The Sun is extremely hot. The surface of the Sun (or its outer visible layer, called the photosphere) is about 10,000 degrees Fahrenheit (5,... -
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When early European settlers were moving west and clearing the land, every farm had an abundance of tree stumps in their fields. “Barnstormi... -
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The Mongols, who ruled China for 89 years, were overthrown by Hung-Wu in AD 1368. That marked the start of the Ming dynasty, which lasted un... -
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When the dinosaurs became extinct, the world’s environment was already changing. It was stressed by natural events, such as falling sea leve... -
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Yes. Many children learn this simple poem to help them remember how many days are in each month. Although the origin of the lyrics to "...
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