This is so cool!!!! The Echidna and Platypus.

<img alt="mammals that lay eggs | Mammals, Unusual animals, Fun facts about animals" src="https://i.pinimg.com/736x/3b/9c/a1/3b9ca19b81a008d8d1907e2ad3d1b69a.jpg" />

This is so cool!!!! The Echidna and Platypus.

This is so cool!!!! The Echidna and Platypus.

What are the only two mammals in the world that lay eggs?!

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What are the only two mammals in the world that lay eggs?!

What are the only two mammals in the world that lay eggs?!