How do penguins stay warm in freezing water?
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Penguins stay warm in freezing water thanks to their dense, waterproof feathers and a thick layer of blubber beneath their skin. Their feathers trap a layer of insulating air, while the blubber retains body heat. Penguins also have counter-current heat exchange systems in their flippers and legs, minimising heat loss. These adaptations allow them to thrive in some of the coldest environments on Earth.