[Nick Danger]

So basically we're all living on a big dirt clod with a rock inside it. That's very reassuring.

[Doctor Stochastic]

So basically we're all living on a big dirt clod with a rock inside it.

It's a little deeper than that. We're living on a big dirt clod (a bit damp in places) with a rock inside it and in turn the rock contains a ball of iron (but no succession of turtles.)