Not literally naked but yes...meet the sand puppy like the name says it loves burrowing and mostly lives underground. It can be found in East Africa.

Image credit

Very interesting facts about this rat:

• They lack pain sensitivity in their skins;
• They are resistant to cancer;
• They can stay long underground were oxygen is very low
• They can grow to 100 millimetres long
• They usually weigh up to 35 grams but females bigger up to 50 grams

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The most interesting fact that really caught my eye was the fact that they cannot feel pain.

This because their naked skin does not have neurotransmitter which sends pain signals to the brain.

Source

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