James Harkin

And so he came up with the idea that we were once a big continent and he called it Gondwanaland.

That's so cool.

But he thought that it wasn't that they came apart and came together.

He thought that the water just filled in the gaps and then disappeared again and then filled in the gaps and disappeared again.

I see.

I think on Venus, like, it's so hot when the crust sort of moves, the inside just comes up and then just fills in the gaps.

Yeah.

So there's no drift.

It just kind of just fills in the gaps immediately.

That's interesting.

But I think in that, is it not that Disney cartoon where they go to try and mine that moon and they sing, I didn't see it coming.

That's one of my top ten trenches.

Yeah.

I know there's a really deep one up in the...

In the Arctic, my camera was cold.

No, it is the deepest, but it's not the closest to the centre of the Earth.

Because the Earth is like an oblate spheroid, so it's fatter in its middle, like a lot of us.

If you go down to the bottom of the...

Arctic Ocean, the trench is there.

I close it to the center of the earth.