ScienceMag has a post about this result [0]. From that text:

"Perhaps the Cubists were right. Researchers have found that when everything from icebergs to rocks breaks apart, their pieces tend to resemble cubes. The finding suggests a universal rule of fragmentation at scales ranging from the microscopic to the planetary."

[0] https://www.sciencemag.org/news/2020/07/rocks-icebergs-natur...