The male Emperor penguin withstands the Antarctic cold for 60 days or more to protect his eggs, which he keeps on his feet, covered with a feathered flap.
(During this entire time he doesn’t eat a thing, in fact most daddy penguins lose about 25 pounds while they wait for their babies to hatch. Afterwards, they feed the chicks a special liquid, which they regurgitate from their throats. When the mother penguins return to care for the young, the fathers go to sea to eat and rest. Of course the average female mother does it the other way round. We put on pounds whilst we’re pregnant, and then when the baby is born we go off to starve ourselves and work.)