Neolithic ceremony at West Kennet Long Barrow, Wilshire, circa 1985-c2012. Reconstruction drawing. A...

Family ties

Look: Ancient family tree reveals 2 surprising traits of Stone Age society

Families have changed a lot since then — and in some ways, they haven’t.

Heritage Images/Hulton Archive/Getty Images

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What makes a family a family?

For some, it’s all about biology.

But for others, family is more than just shared DNA.

Societies from the early Stone Age may have opted for a broader definition of family ties.

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