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I haven't found any evidence that a half castration was ever performed for this purpose. But it is an ancient belief that right testicle semen produces boys, and the left produces girls. Aristotle attributed the idea to "Anaxagoras and certain other physiologers". However, the theory that the sex of the child is determined by where the semen lands ...


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I can't find the primary reference easily, but numerous sites attribute the idea to an 18th century French book which (in English) is titled "The Art of Boys." Wikipedia provides a formal reference: Michel Procope-Couteaux, L'art de faire des garçons, 1770, p. 129. I have found no indication that this advice was actually followed. The 1750 edition ...


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Aryabhata (476-550 AD), an Indian mathematician and astronomer, in his Aryabhatiyam used the word "Bhoo Gola (भूगोल​)" to refer to the Earth in which the word "भू (Bhoo)" means the earth and "गोल​ (Gola)" means a sphere or the globe. In the introduction of the book, source[1] mentions that The "गोलपाद (Gola Paada)" ...


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