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Duck-Billed Platypus

Reptiles and birds (*note* birds are often considered reptiles; this has to do with evolution - similar bone structures, common ancestors, ect; birds and reptiles actually have a lot in common in this way...but I digress) are also vertebrate animals that lay hard-shelled eggs. The Duck-Billed Platypus is only one of two mammals that do not give birth to live babies but lay eggs instead - the other mammal is the Echidna.

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13y ago

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