“snail shell” was created in 2018. It shows a miracle of nature, the “spira mirabilis” (clockwise). It is a spiral in which, with each revolution around its center, the distance from that center changes by the same factor. Bernoulli (1655-1705) gave it the name “miracle spiral”.
The absolute tip of a shell of a small freshwater snail can be seen. The magnification is about 3:1. A homemade lens based on Zeiss Luminar attachments was used to emphasize the special colors and shades.