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.

For more than 60 years, many biologists had begun to wonder if a strange, egg-laying mammal named after British naturalist David Attenborough would ever be seen again. Signs of the mysterious creature ...

If you’ve always thought echidnas and platypuses were distant cousins who went their separate ways on land and water, think again. A single fossilized arm bone, found in a remote corner of ...

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 ...