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
You’re assuming that all 137 billion of those ancestors are different people.
If your parents happened to be brother and sister, then you’d only have 2 grandparents instead of 4, because your parents shared both parents. That’s an extreme example, but if you researched your family tree far enough you would eventually start seeing ancestors who appear on both sides of a particular branch…4th cousins getting married, that sort of thing.
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