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  • ...one in [[Greek astronomy|Greek and Hellenistic astronomy]], in classical [[Indian astronomy]], in [[Sassanid Empire|Sassanian]], [[Byzantine Empire|Byzantine ...cs was [[sexagesimal]], or a base 60 [[numeral system]] (see: [[Babylonian numerals]]). From this we derive the modern day usage of 60 seconds in a minute, 60
    81 KB (12,115 words) - 06:54, 21 June 2015