The 22 rays on the snout of the star-nosed mole develop in a manner unlike any other known animal appendage.
Noses serve as windows to the brain.
Catania, K.C., and J.H. Kaas. The unusual nose and brain of the star-nosed mole. Panganiban, G., et al . 1997. The origin and evolution of animal appendages. University Avenue Madison, WI 53706 From Science News , Vol.