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Cyfrol sy'n cyflwyno hanes y ffisegydd Evan James Williams, un o'r gwyddonwyr mwyaf galluog a welodd Cymru erioed. Bu'n gweithio gyda ffisegwyr byd-enwog, rhai yn enillwyr gwobr Nobel, ac ymysg ei lwyddiannau chwaraeodd ran allweddol yn narganfyddiad gronyn elfennol newydd.
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