The first rhythm and order I think i found as a graduate student in anatomy (light microscopy of cartilege) was the order of the beginning of long bone development in mice. Back then, (as in 50 years ago) many journals didn’t have cover images. At this time, dissolving all my records, publications, micrographs from the finite universe, I made this cover for one very lovely design in nature. I attach a very bad phone phot of the publication (not even I, its author, was willing to spend the highway robbery that some journal websites ask for an almost equally fuzzy scanned image of the original).
Here is my suggested cover, half century down the pike, and a free link to a terrible scanned pdf of the paper.