Families have changed a lot since then — and in some ways, they haven’t.
Researchers writing in the journal Nature chronicled the family tree of 35 individuals who lived 5,700 years ago.
Reich et al. Nature, 2021
“Some or all of these eight may have been considered kin by association or co-residence, or by adoption, raising the possibility of a meaningful role for completely non-biological kinship within the community.”
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But distant and non-relatives have been found in other tombs from the Stone Age, raising the question of what roles they played in society.