Why Dont Penguins Feet Freeze?

Penguins feet are padded with fatty tissue and protected by thick rubbery skin. The muscles that operate the feet are located inside their warm bodies.

Penguins can control the rate of blood flow to their feet by varying the diameter of vessels supplying the blood. Reducing the flow in cold conditions and increasing the flow when its warm.

Penguins also rock about to reduce the direct surface contact with the ice.