Drs. Chris and Zand van Tulleken

You said in the main episode calcium is so important for so many different body functions.

It was functioning in every single cell, doing all these different things.

How do we regulate it and how did that system evolve?

Parathyroid.

From a gland that's near the thyroid but isn't the thyroid.

Can you just say, because the parathyroid anatomy is quite interesting, can you just, for listeners who may not know where their parathyroid glands are, like how could they point to them?

Like a butterfly's landed on your neck.

Yes.

What?

I was going to ask about your rhino.

You're the first guest to bring one.

Yes, and there's a thing where you don't want to immediately go, what's with the rhino?

It feels like a personal question.

Okay, so tell us about the rhino.

Show us the rhino and tell us about it.

Did she know the story of the parathyroid and the rhino?

Did you know?

Oh, that is fantastic.

So she turned up going, well, I'm sure you understand the significance of this Indian rhinoceros.

And you went, I have no idea why you're giving me this.