Yaniv Erlich: How we're building the world's largest family tree

Computational geneticist Yaniv Erlich helped build the world's largest family tree — comprising 13 million people and going back more than 500 years. He shares fascinating patterns that emerged from the work — about our love lives, our health, even decades-old criminal cases — and shows how crowdsourced genealogy databases can shed light not only on the past but also on the future.

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