For millennia, couples have had to decide where to live. "For the vast majority of human history," says Lara Cassidy, a geneticist at Trinity College Dublin, "societies were centered around ties ...

Geneticist Lara Cassidy wasn't surprised to find several generations of the same family buried in an Iron Age cemetery near Dorset, England. But she was quite surprised to find most of them were ...

"That was really jaw-dropping — it's never been observed before in European prehistory," said study co-author Lara Cassidy, a geneticist at Trinity College Dublin.

LARA CASSIDY: And for the vast majority of human history, societies were sort of centered around ties of kinship. So you're deciding whose family you're going to live with.

For millennia, couples have had to decide where to live. "For the vast majority of human history," says Lara Cassidy, a geneticist at Trinity College Dublin, "societies were centered around ties ...

Cassidy was eager to collaborate on studying the remains of the Iron Age burial site of a Celtic tribe called the Durotriges dating from about 100 BCE to 100 CE in what is now southern England.

For millennia, couples have had to decide where to live. "For the vast majority of human history," says Lara Cassidy, a geneticist at Trinity College Dublin, "societies were centered around ties ...

For millennia, couples have had to decide where to live. "For the vast majority of human history," says Lara Cassidy, a geneticist at Trinity College Dublin, "societies were centered around ties ...