The emperor penguin is the heaviest and largest of the penguin species and is listed on the International Union for ...

Temperatures in the centre of a huddle can reach up to 37 °C ... feathers to act as an insulating barrier, keeping the penguins warm despite the bitter cold.

Penguins on the windward edge of the huddle regularly peel off and join the more sheltered side, creating a constant rotation through the warm centre. Survival depends on cooperation. Receiving a ...