DNA evidence extracted from a Stone Age grave has revealed the earliest evidence for the nuclear family as a social structure.
Genetic analysis of the grave's occupants (two adults and two children) confirms they were a mother, father, and their children. The family was killed in a violent conflict, and scientists say survivors likely returned to bury their loved ones.
Each adult was buried holding one of the children, and the individuals were laid to rest facing one another.
Archeologists say the site is approximately 4600 years old.
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