ALL WHO LIVED IN THE YEAR 1200 ARE YOUR FOREFATHERS!
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You have two parents, four grandparents, eight great-grandparents and so on. - doubling each time. Duration of one generation is 25 years. The number of ancestors of your age you have at any point in the past is 2^y/25, with y being number of years ago. For example, 100 years ago (2^100/25 = 2^4 = 16) Your sixteen grandparents would have been your age. 750 years ago, you would...
