eli5 How are so many ancestors possible?

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Posted elsewhere but would like explained like I’m 5.

What I can’t get my head around is: I had 2 parents, they had 4 (in total) who would have had 8 in a geometric progression, so going back even 1000 years or 20 generations (assuming an average lifespan of 50 years) is 2,097,152 ancestors for just me, and given that there is a reported 7.9 billion people on earth alive today it seems mathematically impossible that all those people could have existed.

In: 7

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Anonymous 0 Comments

It’s almost like we’re all related and should treat strangers as though they are part of an extended family. 🤔

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