ancestors

I suppose that many forum members interested in archeogenetics and genetic genealogy are also interested in traditional genealogy. I personally got interested in paper genealogy long before DNA tests existed and I was able to build a sizeable family tree with over 16,000 unique ancestors (unique...

Have you ever wondered how many ancestors you had 200 years ago, or 500 years ago, 1000 years ago, 2000 years ago? Venture to take a guess? It's easy enough to count how many ancestors we have after 3 generations (8 great-grand-parents), 4 generations (16 g-g-grandparents), etc. But what about...