It is a popular belief that Newton discovered gravitation through being hit on the head by a falling apple. How simple it all was.
Naylor, V.D. (1954), "The Wright Brothers' Papers: A Record of Painstaking Research and Experiment", Aircraft Engineering and Aerospace Technology, Vol. 26 No. 11, pp. 393-394. https://doi.org/10.1108/eb032494
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