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.

We pick up just short of where we ended episode 8, more than halfway through Apollo 11's final descent to the lunar surface.

Okay.

7.30 coming up.

That's Neil Armstrong, marking the time elapsed since they started firing the engine

on the lunar module, committing them to a landing. That thrust has slammed the brakes on their

spacecraft with a dramatic loss of speed and altitude, taking them from 50,000 feet to where

they are now at 16,000 feet, 5,000 meters.

Remember, until now, Eagle has been flying on its side, feet first,

with the astronauts lying on their backs looking out into space.

But now the lembs beginning to tilt, bringing Armstrong's head up a little, and he

catches a tantalizing glimpse of the moon at the bottom of his window.

And I have the window. I have that you out to order.

They're in the thick of the fight, having already battled with patchy communications and an overloaded computer.

And they know they're going to overshoot their planned landing site by several miles, taking them into hazardous territory.

But the greatest challenge is yet to come.

Time and fuel are running out, and Armstrong will be forced to fly the lunar module

...