Is a platypus the only Marsupial that lay eggs?

Answer:
The platypus is a monotreme, not a marsupial and there are just 2 species of monotreme mammals. As well as the platypus, there is the long-beaked echidna and the short-beaked echidna. These are the only known monotremes.
First answer by ID3571137521. Last edit by On the Wallaby. Contributor trust: 2779 [recommend contributor recommended]. Question popularity: 151 [recommend question].