Nature.

In a experiment, I don't know yet.

Why is Blight so far?

Like, it sounds so simple.

They had no idea.

But now the data's...

I find this not only refreshing, but at some level astounding.

Nature.

Welcome back to the nature podcast.

This week on the show, we'll be learning how to build an early embryo and finding out how mice react to danger.

Plus what ancient rhino remains are teaching us about hominin history.

This is the nature podcast for the 3rd of May 2018.

I'm Adam Levy. And I'm Benjamin Thompson.

In mammals, when a sperm cell fertilises an egg, they merge forming a structure called a zygote.

The zygote then divides into two cells, then four, eight, sixteen and thirty-two,

at which point it's known as a blastocysts.

Blasticists are of great interest to develop mental biologists, but they are difficult to study,

not least because harvesting the relatively rare embryos at the right stage of development is tricky,

even in mice. Enter Nicolas Rivron. He and his team decided not to harvest blastocyst for study,

but to make them instead. Reporter Noah Baker called up Nicholas, who started with an overview

of the blastocyst itself. And just a heads-up, listeners, there's some background noise in this

interview. Nicholas was in a somewhat busy hotel lobby in Nepal when Noah spoke to him.

...