
DNA reveals we're all royalty, yet genetic ancestry tests lie. Adam Rutherford's award-winning masterpiece dismantles racial myths, explains why you share genes with Charlemagne, and shows why genetics can't predict your destiny - despite what companies claim.
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Imagine tracing your family tree back just 20 generations-about 500 years. You'd expect to find around a million ancestors. Yet Europe's entire population then was only 60 million. The math doesn't work because our family trees aren't trees at all-they're intricate, tangled webs. This mathematical certainty means if you have European ancestry, Charlemagne is your direct ancestor. In fact, Yale statistician Joseph Chang demonstrated that all Europeans share a common ancestor from merely 600 years ago. Going back 1,000 years, about 80% of people from that era are ancestors to everyone alive in Europe today. Our most recent common ancestor-someone who connects every living human-likely lived just 3,400 years ago, probably in Asia. We're far more related than we realize, with family lines that don't branch cleanly but intertwine constantly across time and geography. This interconnectedness extends beyond genealogy into our very cells. Modern DNA sequencing has transformed our understanding of human history, making what was once prohibitively expensive now remarkably accessible. These technological advances have allowed scientists to extract DNA from ancient remains, including those of our evolutionary cousins, revealing a story far messier and more fascinating than we ever imagined.