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. Nature.

Nature.

Hello and welcome to the Nature podcast.

This week we'll be finding out about the genetics of a blind fish, hearing about some new microbiome research,

and we'll be learning how to make a new brain scanning helmet.

This is the Nature podcast for the 20th of March 2018.

I'm Charmany Bundell. And I'm Benjamin Thompson.

In our first story today, I'd like to talk about a strange little fish called Astyanax Mexicana,

also known as the Mexican tetra.

These fish are found in freshwater rivers and streams in eastern and central Mexico, and

up into Texas, places like that.

Not all of these fish live above ground though, and some isolated populations live in caves

beneath the limestone mountains in northeast Mexico. It's a tricky place to live for a fish, as Nicholas Rona explains.

The cave environment is entirely dark.

There is no lights or no plants, no photosynthesis, and therefore, at least to our knowledge,

...