Cassidy is expected to challenge RFK Jr. on his vaccine skepticism and views on public health in today's confirmation hearing.

For millennia, couples have had to decide where to live. "For the vast majority of human history," says Lara Cassidy, a ...

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 ...

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 ...