Here’s the evidence: Wild servals, found in Africa, have two normal copies of the Dkk4 gene, and they have large, clear stripes and spots, like a tabby. Felines with one normal and one mutant Dkk4 ...

Nature creates incredible works of living art through its many different animal patterns, such as a leopard’s spots or a zebra’s stripes. But how do animals get these unique designs, and why are no ...