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A pangolin is covered in scales made of the same stuff as your nails.

A pangolin is covered in scales made of the same stuff as your nails.

When it feels shy, a pangolin rolls into a ball. Its hard scales act like armor to keep it safe.

🐾 All Animal Coverings facts →

More facts about Animal Coverings

A polar bear's fur isn't really white — it's clear! A polar bear's fur isn't really white — it's clear! Birds fluff up their feathers to stay warm on cold days. Birds fluff up their feathers to stay warm on cold days. A turtle's shell is part of its body and can feel a touch. A turtle's shell is part of its body and can feel a touch. Sheep grow wool that keeps them warm, and it keeps growing. Sheep grow wool that keeps them warm, and it keeps growing. The sea otter has the thickest fur of any animal. The sea otter has the thickest fur of any animal.