Echidnas, also called spiny anteaters, are some of the weirdest mammals in the world. They're among the only mammals that don't give birth to live babies, and they also carry their young in a pouch.

To stay cool in searing temperatures, the prickly echidna, an egg-laying mammal that lives Down Under, employs a somewhat unusual trick: It blows snot bubbles to keep its nose wet, a new study finds. ...

As the world’s only surviving egg-laying mammals, Australasia’s platypus and four echidna species are among the most extraordinary animals on Earth. They are also very different from each other. The ...