Ari Daniel

Well, Camila says she'd likely be able to work abroad. She's got all this expertise. She has access to these understudied species. She's even done stints abroad. But there's only one place she wants to be, and that's Brazil.

People like Hector Mincing, a PhD student in the lab who's developing a fancy tool to model the cetacean brain in 3D. He too wants to contribute to the field from Brazil.

People like Hector Mincing, a PhD student in the lab who's developing a fancy tool to model the cetacean brain in 3D. He too wants to contribute to the field from Brazil.

People like Hector Mincing, a PhD student in the lab who's developing a fancy tool to model the cetacean brain in 3D. He too wants to contribute to the field from Brazil.

My last stop on my trip is a nearby stretch of beach. Camila looks out at the ocean and she considers the trajectory that brought her to this moment.

My last stop on my trip is a nearby stretch of beach. Camila looks out at the ocean and she considers the trajectory that brought her to this moment.

My last stop on my trip is a nearby stretch of beach. Camila looks out at the ocean and she considers the trajectory that brought her to this moment.

Camila says that little girl she used to be would be happy.

Camila says that little girl she used to be would be happy.

Camila says that little girl she used to be would be happy.

You got it. Cetacean brains. Of course. My pleasure, Gina.

You got it. Cetacean brains. Of course. My pleasure, Gina.

You got it. Cetacean brains. Of course. My pleasure, Gina.

For much of human history, societies have been centered around kinship, so couples have had to decide whose community they're going to live with. Most of the time, it's been the man's, which is why researchers were surprised when they sequenced the ancient DNA of a burial site of a Celtic tribe dating from 100 BCE to 100 CE in what's now southern England.

For much of human history, societies have been centered around kinship, so couples have had to decide whose community they're going to live with. Most of the time, it's been the man's, which is why researchers were surprised when they sequenced the ancient DNA of a burial site of a Celtic tribe dating from 100 BCE to 100 CE in what's now southern England.

The group was related along the female line, meaning that the men had left their families to live with their wives' community. Laura Cassidy is a geneticist at Trinity College Dublin.

The group was related along the female line, meaning that the men had left their families to live with their wives' community. Laura Cassidy is a geneticist at Trinity College Dublin.

The same thing was true among hundreds of Iron Age genomes from cemeteries across Britain, suggesting it's a custom dating back centuries. For NPR News, I'm Ari Daniel.

The same thing was true among hundreds of Iron Age genomes from cemeteries across Britain, suggesting it's a custom dating back centuries. For NPR News, I'm Ari Daniel.

Sam Arman took a detailed look at the teeth of more than 900 kangaroos from both fossils and modern animals.