I'm Mariana Spring, the BBC's social media investigations correspondent.

In my podcast, I've been investigating what happened to the daughter of a conspiracy theorist who died having rejected chemotherapy.

It would mean the world to me if I could make it that she wasn't just another in the long line of people that die in this way.

How does this reflect the rise of health conspiracy theories on social media and beyond?

The new series of Mariana in Conspiracy Land.

Listen on BBC Sounds.

30 seconds and counting.

Welcome to the countdown to the launch of the BBC World Service podcast, 13 minutes to the moon.

Astronauts report, it feels good.

I was the first female engineer to work in NASA's mission control center in an operational support role. I was an astronaut in the Apollo program, the greatest program in the history of space flight,

the one that took humans to the moon for the first time. That was 50 years ago.

My name is Pompi Northcutt. I'm Walt Cunningham.

20 seconds and counting.

I'll be helping to tell the story of how we got to the lunar surface

in 13 minutes to the moon. 15 seconds. Guidance is internal. 13 minutes to the moon will tell the story

of the climax of that first descent to the moon, that final 13 minutes, and it will go back in time to tell the story of the work

that scientists, engineers, astronauts, and so many others did to make it possible.

To get to the moon and back again safely, that was my particular job, it was amazing to be

part of that history.

I'm helping to count down to the podcast launch,

and I thought you might like to know some of the others that you'll be hearing from.

There's Michael Collins, one of the astronauts on the first moon landing mission,

...