Nature in a experiment.

Why is Blight so far?

Like it sounds so simple.

They had no idea.

But now the data's people.

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

Nature.

Welcome to this week's nature podcast.

In the show, we're asking when babies get their first bacteria and how sensitive the climate is to carbon dioxide.

Plus super fast photography and peckish penguins. I'm Charmany Bundell. And I'm Adam Levy.

When did you first come into contact with bacteria? Of course, every day we're practically

swimming with microbes. But what about before we end the world, while we're practically swimming with microbes.

But what about before we end the world, while we're still in our mother's wombs?

For a long time, the womb has been thought of as a pristine environment.

At first it started off that people all thought it was sterile, more or less.

I mean, if bacteria start multiplying over there, then things are going wrong.

This is microbiologist Marcus de Hofau.

The idea of the sterile womb has been around first century.

But recently, researchers have started to challenge this dogma,

and not everyone's on board.

Well, I would say that the current understanding is quite in flux, so people saying one

thing and other people saying another.

...