The story goes that Sir Isaac Newton discovered his law of gravity while sitting under an apple tree and being struck by a falling apple. While somewhat based on truth, this story about one of history's greatest physicists is more myth than reality.
Read about this and other popular physics myths this month at About.com Physics!

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This myth has its origin in the findings of muslim sceintists of
10th to 12th Century of C.E. As the ideas were copied so there has to be a story to tell the world to hide the copying.