The turtle shell and skulls were drawn manually (lots of clicking!), and the background texture is a Turing pattern created using a repeating series of filters. You can do this in any image ...

A brown shell pattern on the heel and a nod to the turtle’s underside at the toe flap then add a needed touch of contrast.

The upper shell is olive to dark brown; the lower shell is hinged, front and back, and varies from yellow to cream colored. Sonoyta mud turtles have mottled patterns on their limbs, head, and neck.

The breakthrough came after they attached specially sized geolocator devices to 114 wild sea turtle shells in the waters ... understand their migration patterns. The data Mansfield's team ...