What is this close-up picture? (WotsThat: Snail shell spiral (macro))

Question

What object is shown in this zoomed-in close-up photo?

RhodochrositeR · Accepted Answer

Snail shell spiral (macro). A snail's shell grows in a logarithmic spiral, adding new material only at the open edge, so the very centre of the spiral is still the same tiny shell the snail hatched with.

Answer: Snail shell spiral (macro)

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