Researchers have discovered how the scaly skin pattern on crocodile faces and jaws is created. Mammalian hairs, bird feathers, and many reptile scales grow from genetically-controlled processes, but the crocodile’s head scales don’t follow this nearly universal rule. Instead, crocodile face and jaw scales seem to emerge from the physical cracking of skin, which creates distinct, random, non-overlapping polygonal shapes.
Read more about this research from the 29 November issue of Science Express here.
[Image courtesy of Michel C. Milinkovitch; click the image for more information.]