I googled the amount of people that lived on earth throughout its entire history, it’s roughly 108 billions. If I take 1 person and multiply by 2 for each generation of ancestors, at the 37th generation it already outnumbers that 108 billions. (it’s 137 billions). If we take 20 years for 1 generation, it’s only 740 years by the 37th generation.
How??
(I suck at math, I recounted it like 20 times, got that 137 billions at 37th, 38th and 39th generation, so forgive me if it’s not actually at 37th, but it’s still no more than 800 years back in history)
In: 1391
(Nearly) everyone of European ancestry is a descendant of Charlemagne. If all four of my grandparents are descendants of Charlemagne, that means Charlemagne fills _at least_ four different ancestor slots on my family tree.
But it isn’t just Charlemagne, it’s many of my ancestors, meaning that if you go back far enough most of the names will be duplicated elsewhere in your tree.
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