We All Have a Recent Common Ancestor

“Had you entered any village on Earth in around 3,000 B.C., the first person you would have met would probably be your ancestor,” Hein marveled.

….

How can this be?

It’s simple math. Every person has two parents, four grandparents and eight great-grandparents. Keep doubling back through the generations — 16, 32, 64, 128 — and within a few hundred years you have thousands of ancestors.

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