Why do we startle when we are surprised or alarmed? The startle or "jump" that occurs when we are surprised or alarmed is caused by a nervous system response called the "alarm or fight or flight response".
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Why is the sky blue? The sky is blue due to Rayleigh scattering, a phenomenon that occurs when sunlight encounters the Earth's atmosphere and is scattered in all directions.
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Who invented the airplane? The invention of the airplane is primarily attributed to the Wright brothers, Orville and Wilbur Wright. In 1903, the Wright brothers conducted the first controlle...
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